求解初二数学下册计算(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)计算:(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
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求解初二数学下册计算(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)计算:(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
求解初二数学下册计算(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
计算:(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
求解初二数学下册计算(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)计算:(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
=(1+x)(1-x)/(x+2)的平方 X 1/(x-1)的平方 X (x+2)(x+1)/(x-1)
=(x+1)的平方/-(x+2)(x-1)的平方
原式=[1-x^2/(x+2)^2]/(x-1)^2*[(x+1)(x+2)/(x-1)]
=2*(2x+2)/[(x-1)^2(x+2)^2]*[(x+1)(x+2)/(x-1)]
=4*(x+1)^2/[(x-1)^3(x+2)]
(1-x²/x²+4x+4)÷(x-1)²×(x²+3x+2/x-1)
=[(1-x)²/(x²+4x+4)] ÷ (x-1)² × [ (x²+3x+2)/(x-1)]
=[(1-x)(x+1) / (x+2)² ] ÷ (x-1)(x+1)(x+2)
=[ -1/(x+2)² ] ÷ (x+2)
=[ -1 / (x+2)² ] × 1/(x+2)
=-1 / (x+2)³