Question

因式分解：①(a+3)²-6（a+3）②（x-y）²-2（y-x）²

Answer 1

1 (a+3)(a-3)

2 -(x-y)²

3 (a+3)(a-4)

4 a^2+b^2-4a^2b^2x09

=a^2+b^2-4a^2b^2+2ab-2abx09

=(a+b)^2-4a^2b^2-2abx09

=(a+b)^2-4a^2b^2-2ab+1/4-1/4x09

=(a+b)^2-(2ab+1/2)^2+1/4x09

=(a+b+2ab+1/2)(a+b-2ab-1/2)+1/4

5 (x+y+1)(x-y)

6 (3a-3b+1)²

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