因式分解急急急
发布网友
发布时间:2024-10-21 22:09
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共3个回答
热心网友
时间:2024-11-22 04:57
答:
(12y²-3)y²
=3(4y²-1)y²
=3y²(2y-1)(2y+1)
(2x+y)²-(x+2y)²
=(2x+y+x+2y)(2x+y-x-2y)
=3(x+y)(x-y)
热心网友
时间:2024-11-22 04:57
第一题好奇怪啊,难道不是12乘x的二次方?
(1)12x²-3y²
=3(4x²-y²)
=3(2x+y)(2x-y)
(2)(x+y)²-(x+2y)²
=(2x+y+x+2y)(2x+y-x-2y)
=3(x+y)(x-y)
热心网友
时间:2024-11-22 04:58
(12y^2-3)y^2=3(4y^2-1)y^2=3y^2[(2y)^2-1]=3y^2(2y-1)(2y+1)
(2x+y)^2-(x+2y)^2=(2x+y+x+2y)(2x+y-x-2y)=(3x+3y)(x-y)=3(x+y)(x-y)