问题标题:
(1)(a-0.5)^2(a+0.5)^2(2)因式分解3x^2-7x+2(3)(m^2+n^2)^2-4m^2n^2
问题描述:
(1)(a-0.5)^2(a+0.5)^2(2)因式分解3x^2-7x+2(3)(m^2+n^2)^2-4m^2n^2
康烁回答:
(1)(a-0.5)^2(a+0.5)^2
=[(a-0.5)(a+0.5)]^2
=(a^2-0.25)^2
=a^4-0.5a^2+0.0625
(2)因式分解
3x^2-7x+2
=(3x-1)*(x-2)
(3)(m^2+n^2)^2-4m^2n^2
=[(m^2+n^2)+2mn][(m^2+n^2)-2mn]
=(m+n)^2*(m-n)^2
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