因式分解 要过程
一、a^5-a二、(x^2-1)+6(1-x^2)+9三、(x^2-1)^2+6(1-x^2)+4四、(x+5)(x-1)+9五、(x-1)(x-2)-20四、2x^3-...
一、a^5-a 二、(x^2-1)+6(1-x^2)+9 三、(x^2-1)^2+6(1-x^2)+4 四、(x+5)(x-1)+9 五、(x-1)(x-2)-20 四、2x^3-14x^2+10x
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a^5-a
=a(a^4-1)
=a(a²+1)(a²-1)
=a(a²+1)(a+1)(a-1)
(x^2-1)+6(1-x^2)+9
=(x^2-1)-6(x^2-1)+9
=(x²-1-3)²
=(x²-4)²
=(x+2)²(x-2)²
(x^2-1)^2+6(1-x^2)+4
=x^4-2x²+1+6-6x²+4
=X^4-8x²+11
(题目可能有错)
(x+5)(x-1)+9
=x²+4x-5+9
=x²+4x+4
=(x+2)²
(x-1)(x-2)-20
=x²-3x+2-20
=x²-3x-18
=(x-6)(x+3)
2x^3-14x^2+10x
=2x(x²-7x+5)
祝学习进步,望采纳~~
=a(a^4-1)
=a(a²+1)(a²-1)
=a(a²+1)(a+1)(a-1)
(x^2-1)+6(1-x^2)+9
=(x^2-1)-6(x^2-1)+9
=(x²-1-3)²
=(x²-4)²
=(x+2)²(x-2)²
(x^2-1)^2+6(1-x^2)+4
=x^4-2x²+1+6-6x²+4
=X^4-8x²+11
(题目可能有错)
(x+5)(x-1)+9
=x²+4x-5+9
=x²+4x+4
=(x+2)²
(x-1)(x-2)-20
=x²-3x+2-20
=x²-3x-18
=(x-6)(x+3)
2x^3-14x^2+10x
=2x(x²-7x+5)
祝学习进步,望采纳~~
展开全部
一、a^5-a
=a(a^4-1)
=a(a^2-1)(a^2+1)
=a(a-1)(a+1)(a^2+1)
二、(x^2-1)+6(1-x^2)+9
=(x^2-1)-6(x^2-1)+9
=(x^2-1-3)^2
=(x^2-4)^2
=[(x-2)(x+2)]^2
=(x-2)^2(x+2)^2
三、(x^2-1)^2+6(1-x^2)+4题目有问题
=x^4-2x^2+1+6-6x^2+4
=x^4-8x^2+11
四、(x+5)(x-1)+9
=x^2+4x-5+9
=x^2+4x+4
=(x+2)^2
五、(x-1)(x-2)-20
=x^2-3x+2-20
=x^2-3x-18
=(x-6)(x+3)
四、2x^3-14x^2+10x
=2x(x^2-7x+5)
=a(a^4-1)
=a(a^2-1)(a^2+1)
=a(a-1)(a+1)(a^2+1)
二、(x^2-1)+6(1-x^2)+9
=(x^2-1)-6(x^2-1)+9
=(x^2-1-3)^2
=(x^2-4)^2
=[(x-2)(x+2)]^2
=(x-2)^2(x+2)^2
三、(x^2-1)^2+6(1-x^2)+4题目有问题
=x^4-2x^2+1+6-6x^2+4
=x^4-8x^2+11
四、(x+5)(x-1)+9
=x^2+4x-5+9
=x^2+4x+4
=(x+2)^2
五、(x-1)(x-2)-20
=x^2-3x+2-20
=x^2-3x-18
=(x-6)(x+3)
四、2x^3-14x^2+10x
=2x(x^2-7x+5)
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