解方程:(x+2)²=(2x-1)² 分解因式:(m²-2m)²+2m(m-2)+1 xiexie
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解方程:(x+2)²=(2x-1)² 分解因式:(m²-2m)²+2m(m-2)+1 xiexie
解方程:(x+2)²=(2x-1)² 分解因式:(m²-2m)²+2m(m-2)+1 xiexie
解方程:(x+2)²=(2x-1)² 分解因式:(m²-2m)²+2m(m-2)+1 xiexie
(2x-1)²-(x+2)²=0
[(2x-1)+(x+2)][(2x-1)-(x+2)]=0
(3x+1)(x-3)=0
x=1/3,x=3
原式=(m²-2m)²+2(m²-2m)+1
=(m²-2m+1)²
=(m-1)^4
回答的好
解方程:(x+2)²=(2x-1)² 分解因式:(m²-2m)²+2m(m-2)+1
(x+2)²=(2x-1)²
(x+2)²-(2x-1)²=0
(x+2+2x-1)(x+2-2x+1)=0
(3x+1)(-x+3)=0
x1=-1/3 x2=3
(m²-2m)²+2m(m-2)+1
=(m²-2m)²+2(m²-2m)+1
=(m²-2m+1)²
=(m-1)^4