因式分解
1。x^2-x-722。x^2+7xy+12y^23。a^2b^2-7abc+12c^24。-a^3+16a^2b-28ab^24。(y^2-3)^2+4y(y^2-3)...
1。x^2-x-72
2。x^2+7xy+12y^2
3。a^2b^2-7abc+12c^2
4。-a^3+16a^2b-28ab^2
4。(y^2-3)^2+4y(y^2-3)+4y^2
5。x^2-7xy-18y^2
6。x^2+7xy-18y^2
7。x^2y^2-11xy^3-26y^4
8。x^3z-5x^2yz+6xy^2z
9。-3a^4-27a^3x-24a^2x^2
10。x^2-3xy-40y^2
11。a^2+8ab-33b^2
12。t^4-3t^3-28t^2
13。-s^3-4s^2+12s
14。-x^4y+5x^2y^3-4y^5 展开
2。x^2+7xy+12y^2
3。a^2b^2-7abc+12c^2
4。-a^3+16a^2b-28ab^2
4。(y^2-3)^2+4y(y^2-3)+4y^2
5。x^2-7xy-18y^2
6。x^2+7xy-18y^2
7。x^2y^2-11xy^3-26y^4
8。x^3z-5x^2yz+6xy^2z
9。-3a^4-27a^3x-24a^2x^2
10。x^2-3xy-40y^2
11。a^2+8ab-33b^2
12。t^4-3t^3-28t^2
13。-s^3-4s^2+12s
14。-x^4y+5x^2y^3-4y^5 展开
5个回答
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1。x^2-x-72=(x+8)(x-9)
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab-3c)(ab-4c)
4。-a^3+16a^2b-28ab^2=-a(a²-16ab+28b²)=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y²-3-2y)²=(y-3)²(y+1)²
5。x^2-7xy-18y^2=(x+2y)(x-9y)
6。x^2+7xy-18y^2=(x+2y)(x-9y)
7。x^2y^2-11xy^3-26y^4=y²(x²-11xy-26y²)=y²(x+2y)(x-11y)
8。x^3z-5x^2yz+6xy^2z=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a²(a²+9ax+8x²)=-3a²(a+x)(a+8x)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2=(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t²(t-7)(t+4)
13。-s^3-4s^2+12s=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5=-y(x²-y²)(x²-4y²)=-y(x-y)(x+y)(x-2y)(x+2y)
这么多的题目,你要给我加分。
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab-3c)(ab-4c)
4。-a^3+16a^2b-28ab^2=-a(a²-16ab+28b²)=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y²-3-2y)²=(y-3)²(y+1)²
5。x^2-7xy-18y^2=(x+2y)(x-9y)
6。x^2+7xy-18y^2=(x+2y)(x-9y)
7。x^2y^2-11xy^3-26y^4=y²(x²-11xy-26y²)=y²(x+2y)(x-11y)
8。x^3z-5x^2yz+6xy^2z=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a²(a²+9ax+8x²)=-3a²(a+x)(a+8x)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2=(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t²(t-7)(t+4)
13。-s^3-4s^2+12s=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5=-y(x²-y²)(x²-4y²)=-y(x-y)(x+y)(x-2y)(x+2y)
这么多的题目,你要给我加分。
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1。x^2-x-72
=(x-9)(x+8)
2。x^2+7xy+12y^2
=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2
=(ab-4c)(ab-3c)
4。-a^3+16a^2b-28ab^2
=-a(a²-16ab+28b²)
=-a(a-14b)(a-2b)
4。(y^2-3)^2+4y(y^2-3)+4y^2
=(y²-3+2y)²
=(y+3)²(y-1)²
5。x^2-7xy-18y^2
=(x-9y)(x+2y)
6。x^2+7xy-18y^2
=(x+9y)(x-2y)
7。x^2y^2-11xy^3-26y^4
=y²(x²-11xy-26y²)
=y²(x-13y)(x+2y)
8。x^3z-5x^2yz+6xy^2z
=xz(x²-5xy+6y²)
=xz(x-3y)(x-2y)
9。-3a^4-27a^3x-24a^2x^2
=-3a²(a²+9ax+8x²)
=-3a²(a+8x)(a+x)
10。x^2-3xy-40y^2
=(x-8y)(x+5y)
11。a^2+8ab-33b^2
=(a+11b)(a-3b)
12。t^4-3t^3-28t^2
=t²(t²-3t-28)
=t²(t-7)(t+4)
13。-s^3-4s^2+12s
=-s(s²+4s-12)
=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5
=-y(x^4-5x²y²+4y²)
=-y(x²-4y²)(x²-y²)
=-y(x+2y)(x-2y)(x+y)(x-y)
=(x-9)(x+8)
2。x^2+7xy+12y^2
=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2
=(ab-4c)(ab-3c)
4。-a^3+16a^2b-28ab^2
=-a(a²-16ab+28b²)
=-a(a-14b)(a-2b)
4。(y^2-3)^2+4y(y^2-3)+4y^2
=(y²-3+2y)²
=(y+3)²(y-1)²
5。x^2-7xy-18y^2
=(x-9y)(x+2y)
6。x^2+7xy-18y^2
=(x+9y)(x-2y)
7。x^2y^2-11xy^3-26y^4
=y²(x²-11xy-26y²)
=y²(x-13y)(x+2y)
8。x^3z-5x^2yz+6xy^2z
=xz(x²-5xy+6y²)
=xz(x-3y)(x-2y)
9。-3a^4-27a^3x-24a^2x^2
=-3a²(a²+9ax+8x²)
=-3a²(a+8x)(a+x)
10。x^2-3xy-40y^2
=(x-8y)(x+5y)
11。a^2+8ab-33b^2
=(a+11b)(a-3b)
12。t^4-3t^3-28t^2
=t²(t²-3t-28)
=t²(t-7)(t+4)
13。-s^3-4s^2+12s
=-s(s²+4s-12)
=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5
=-y(x^4-5x²y²+4y²)
=-y(x²-4y²)(x²-y²)
=-y(x+2y)(x-2y)(x+y)(x-y)
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1。x^2-x-72=(x+8)(x-9)
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab-3c)(ab-4c)
4。-a^3+16a^2b-28ab^2=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y+3)²(y-1)²
5。x^2-7xy-18y^2=(x+2y)(x-9y)
6。x^2+7xy-18y^2=(x-2y)(x+9y)
7。x^2y^2-11xy^3-26y^4=y²(x+2y)(x-13y)
8。x^3z-5x^2yz+6xy^2z=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a²(8x-a)(x-a)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2==(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t²(t+4)(t-7)
13。-s^3-4s^2+12s=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5=-y(x+y)(x-y)(x+2y)(x-2y)
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab-3c)(ab-4c)
4。-a^3+16a^2b-28ab^2=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y+3)²(y-1)²
5。x^2-7xy-18y^2=(x+2y)(x-9y)
6。x^2+7xy-18y^2=(x-2y)(x+9y)
7。x^2y^2-11xy^3-26y^4=y²(x+2y)(x-13y)
8。x^3z-5x^2yz+6xy^2z=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a²(8x-a)(x-a)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2==(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t²(t+4)(t-7)
13。-s^3-4s^2+12s=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5=-y(x+y)(x-y)(x+2y)(x-2y)
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1。x^2-x-72=(x-9)(x+8)
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab+3c)(ab+4c)
4。-a^3+16a^2b-28ab^2=-a(a^2-16ab+28b^2)=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y^2-3+2y)^2=(y+3)^2(y-1)^2
5。x^2-7xy-18y^2=(x-9y)(x+2y)
6。x^2+7xy-18y^2=(x+9y)(x-2y)
7。x^2y^2-11xy^3-26y^4=y^2(x^2-11xy-26y^2)=y^2(x-13y)(x+2y)
8。x^3z-5x^2yz+6xy^2z=xz(x^2-5xy+6y^2)=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a^2(a^2+9ax+8x^2)=-3a^2(a+x)(x+8x)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2=(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t^2(t^2-3t-28)=t^2(t-7)(t+4)
13。-s^3-4s^2+12s=-s(s^2+4s-12)=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5
=-y(x^4-5x^2y^2+4y^4)
=-y(x^2-4y^2)(x^2-y^2)
=-y(x+2y)(x-2y)(x+y)(x-y)
2。x^2+7xy+12y^2=(x+3y)(x+4y)
3。a^2b^2-7abc+12c^2=(ab+3c)(ab+4c)
4。-a^3+16a^2b-28ab^2=-a(a^2-16ab+28b^2)=-a(a-2b)(a-14b)
4。(y^2-3)^2+4y(y^2-3)+4y^2=(y^2-3+2y)^2=(y+3)^2(y-1)^2
5。x^2-7xy-18y^2=(x-9y)(x+2y)
6。x^2+7xy-18y^2=(x+9y)(x-2y)
7。x^2y^2-11xy^3-26y^4=y^2(x^2-11xy-26y^2)=y^2(x-13y)(x+2y)
8。x^3z-5x^2yz+6xy^2z=xz(x^2-5xy+6y^2)=xz(x-2y)(x-3y)
9。-3a^4-27a^3x-24a^2x^2=-3a^2(a^2+9ax+8x^2)=-3a^2(a+x)(x+8x)
10。x^2-3xy-40y^2=(x+5y)(x-8y)
11。a^2+8ab-33b^2=(a+11b)(a-3b)
12。t^4-3t^3-28t^2=t^2(t^2-3t-28)=t^2(t-7)(t+4)
13。-s^3-4s^2+12s=-s(s^2+4s-12)=-s(s+6)(s-2)
14。-x^4y+5x^2y^3-4y^5
=-y(x^4-5x^2y^2+4y^4)
=-y(x^2-4y^2)(x^2-y^2)
=-y(x+2y)(x-2y)(x+y)(x-y)
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1、=(x-9)x(x+8) 8.=xz(x-3y)(x-2y)
2.=(x+3y)(x+4y) 9.=-a^2(a+x((3a+24x)
3.=(ab-3c)(ab-4c) 10.=(x-8y)(x+5y)
4.=-a(a-14b)(a-2b) .11.=(a+11b)(a-3b)
5.=(x-9y)(x+2y) 12.=t^2(t-7)(t+4)
6..=(x+9y)(x-2y) 13.=-s(s+6)(s-2)
7.=y^2(x-13y)(x+2y) 14.=-y(x^2-4y^2)(x^2-y^2)
2.=(x+3y)(x+4y) 9.=-a^2(a+x((3a+24x)
3.=(ab-3c)(ab-4c) 10.=(x-8y)(x+5y)
4.=-a(a-14b)(a-2b) .11.=(a+11b)(a-3b)
5.=(x-9y)(x+2y) 12.=t^2(t-7)(t+4)
6..=(x+9y)(x-2y) 13.=-s(s+6)(s-2)
7.=y^2(x-13y)(x+2y) 14.=-y(x^2-4y^2)(x^2-y^2)
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