(x+y)²-4(x+y)+4因式分解
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(x+y)²-4(x+y)+4因式分解
(x+y)²-4(x+y)+4因式分解
(x+y)²-4(x+y)+4因式分解
(x+y)²-4(x+y)+4
=(x+y)²-2×(x+y)×2+2²
=[(x+y)-2]²
=(x+y-2)² 这样?
(x+y)²-4(x+y)+4因式分解 要4步过程
=(x+y)²-2×2(x+y)+2方
=(x+y-2)方
=【(x+y)-2】*【(x+y)-2】=【(x+y)-2]²
(x+y)^2-4(x+y)+4
=(x+y-2)^2