分解因式:(m+n)² - 4m(m+n)+4m²
分解因式:(2x+y)²-(x+2y²)=____(m+n)²-4m(m+n)+4m²=_____m²-14m+49=_...
分解因式:(2x+y)² -(x+2y²)=____
(m+n)² - 4m(m+n)+4m² =_____
m²-14m+49=_____
a²+2a(b+c)+(b+c)²=_____ 有步骤吗? 展开
(m+n)² - 4m(m+n)+4m² =_____
m²-14m+49=_____
a²+2a(b+c)+(b+c)²=_____ 有步骤吗? 展开
2个回答
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分解因式:(m+n)² - 4m(m+n)+4m²
=[(m+n)-2m]²誉锋辩
=(n-m)²
分解因式:(2x+y)²基悔 -(x+2y)庆缺²=[(2x+y)+(x+2y)][(2x+y)-(x+2y)]
=(3x+3y)(x-y)
=3(x+y)(x-y)
(m+n)² - 4m(m+n)+4m² =_见上____
m²-14m+49=___(m-7)²__
a²+2a(b+c)+(b+c)²=__[a+(b+c)]²=(a+b+c)²___
=[(m+n)-2m]²誉锋辩
=(n-m)²
分解因式:(2x+y)²基悔 -(x+2y)庆缺²=[(2x+y)+(x+2y)][(2x+y)-(x+2y)]
=(3x+3y)(x-y)
=3(x+y)(x-y)
(m+n)² - 4m(m+n)+4m² =_见上____
m²-14m+49=___(m-7)²__
a²+2a(b+c)+(b+c)²=__[a+(b+c)]²=(a+b+c)²___
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