
将下列各式因式分解
1.(x+3)²-(x+3)2.a²-b²-2b-13.(x+2)(x+4)+x²-44.-x^4y²+4x³...
1.(x+3)²-(x+3)
2.a²-b²-2b-1
3.(x+2)(x+4)+x²-4
4.-x^4y²+4x³+y³-4x²y^4
要有过程解答。 展开
2.a²-b²-2b-1
3.(x+2)(x+4)+x²-4
4.-x^4y²+4x³+y³-4x²y^4
要有过程解答。 展开
1个回答
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(x+3)²-(x+3)=(x+3)(x+2)
a²-b²-2b-1
=a²-(b-1)²
=(a+b-1)(a-b+1)
(x+2)(x+4)+x²-4
=(x+2)(x+4)+(x+2)(x-2)
=(x+2)(x+4+x-2)
=2(x+2)(x+1)
题目应该是:-x^4y²+4x³y³-4x²y^4
-x^4y²+4x³y³-4x²y^4
=-x²y²(x²+4xy-4y²)
=-x²y²(x-2y)²
a²-b²-2b-1
=a²-(b-1)²
=(a+b-1)(a-b+1)
(x+2)(x+4)+x²-4
=(x+2)(x+4)+(x+2)(x-2)
=(x+2)(x+4+x-2)
=2(x+2)(x+1)
题目应该是:-x^4y²+4x³y³-4x²y^4
-x^4y²+4x³y³-4x²y^4
=-x²y²(x²+4xy-4y²)
=-x²y²(x-2y)²
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