因式分解:①(a+3)²-6(a+3)②(x-y)²-2(y-x)²
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因式分解:①(a+3)²-6(a+3)②(x-y)²-2(y-x)²
③(a-3)(a+2)-6
④(a²+b²)-4a²b²
⑤(x²+x)-(y²+y)
⑥9(a-b)²+6(a-b)+1
③(a-3)(a+2)-6
④(a²+b²)-4a²b²
⑤(x²+x)-(y²+y)
⑥9(a-b)²+6(a-b)+1
1 (a+3)(a-3)
2 -(x-y)²
3 (a+3)(a-4)
4 a^2+b^2-4a^2b^2\x09
=a^2+b^2-4a^2b^2+2ab-2ab\x09
=(a+b)^2-4a^2b^2-2ab\x09
=(a+b)^2-4a^2b^2-2ab+1/4-1/4\x09
=(a+b)^2-(2ab+1/2)^2+1/4\x09
=(a+b+2ab+1/2)(a+b-2ab-1/2)+1/4
5 (x+y+1)(x-y)
6 (3a-3b+1)²
祝你好好学习,天天向上
2 -(x-y)²
3 (a+3)(a-4)
4 a^2+b^2-4a^2b^2\x09
=a^2+b^2-4a^2b^2+2ab-2ab\x09
=(a+b)^2-4a^2b^2-2ab\x09
=(a+b)^2-4a^2b^2-2ab+1/4-1/4\x09
=(a+b)^2-(2ab+1/2)^2+1/4\x09
=(a+b+2ab+1/2)(a+b-2ab-1/2)+1/4
5 (x+y+1)(x-y)
6 (3a-3b+1)²
祝你好好学习,天天向上
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