问题标题:
【完全平方公式分解因式1.9m^2-6mn+n^22.-16a^2+8ab-b^23.4-12(x-y)+9(x-y)^24.16a^4b+8a^2b+b】
问题描述:
完全平方公式分解因式1.9m^2-6mn+n^22.-16a^2+8ab-b^23.4-12(x-y)+9(x-y)^24.16a^4b+8a^2b+b
金国华回答:
1.9m^2-6mn+n^2
=(3m-n)^2
2.-16a^2+8ab-b^2
=-(16a^2-8ab+b^2)
=-(4a-b)^2
3.4-12(x-y)+9(x-y)^2
=[2-3(x-y)]^2
=(3x-3y-2)^2
4.16a^4b+8a^2b+b
=b(16a^4+8a^2+1)
=b(4a^2+1)^2
点击显示
数学推荐
热门数学推荐