因式分解 (1)25x^3y^5-5x^2y^2 (2)4(a+b)^2-4(a+b)+1 (3)x^4-y^4 (4)-a+2a^2-a^3

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因式分解 (1)25x^3y^5-5x^2y^2 (2)4(a+b)^2-4(a+b)+1 (3)x^4-y^4 (4)-a+2a^2-a^3

因式分解 (1)25x^3y^5-5x^2y^2 (2)4(a+b)^2-4(a+b)+1 (3)x^4-y^4 (4)-a+2a^2-a^3
因式分解 (1)25x^3y^5-5x^2y^2 (2)4(a+b)^2-4(a+b)+1 (3)x^4-y^4 (4)-a+2a^2-a^3

因式分解 (1)25x^3y^5-5x^2y^2 (2)4(a+b)^2-4(a+b)+1 (3)x^4-y^4 (4)-a+2a^2-a^3
(1)25x^3y^5-5x^2y^2
=5x²y²(5xy³-1)
(2)4(a+b)^2-4(a+b)+1
=[2(a+b)-1]²
=(2a+2b-1)²
(3)x^4-y^4
=(x²+y²)(x²-y²)
=(x²+y²)(x+y)(x-y)
(4)-a+2a^2-a^3
=-a(1-2a+a²)
=-a(1-a)²

(1)25x^3y^5-5x^2y^2 =5x²y²﹙5xy³-1﹚
(2)4(a+b)^2-4(a+b)+1
=[2﹙a+b﹚-1]²
=﹙2a+2b-1﹚²
(3)x^4-y^4
=﹙x²+y²﹚﹙x²-y²﹚
=﹙x²+y²﹚﹙x+y...

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(1)25x^3y^5-5x^2y^2 =5x²y²﹙5xy³-1﹚
(2)4(a+b)^2-4(a+b)+1
=[2﹙a+b﹚-1]²
=﹙2a+2b-1﹚²
(3)x^4-y^4
=﹙x²+y²﹚﹙x²-y²﹚
=﹙x²+y²﹚﹙x+y﹚﹙x-y﹚
(4)-a+2a^2-a^3
=-a﹙1-2a+a²﹚
=-a﹙1-a﹚²

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(1)25x^3y^5-5x^2y^2
=5x^2y^2(5xy^3-1)
(2)4(a+b)^2-4(a+b)+1
=(2(a+b)-1)^2
=(2a+2b-1)^2
(3)x^4-y^4
=(x^2-y^2)(x^2+y^2)
=(x-y)(x+y)(x^2+y^2)
(4)-a+2a^2-a^3
=-a(a^2-2a+1)
=-a(a-1)^2

(1)25x^3y^5-5x^2y^2=5x^2y^2(5xy^3-1);
2)4(a+b)^2-4(a+b)+1=(a+b-1)^2;
(3)x^4-y^4 =(x-y)(x+y)(x^2+y^2);
4)-a+2a^2-a^3=-a(1-2a+a^2)=-a(a-1)^2.