计算:(1)(x+1)²-x(x+2) (2)计算:(a²-4/a+2)+a+2
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计算:(1)(x+1)²-x(x+2)(2)计算:(a²-4/a+2)+a+2计算:(1)(x+1)²-x(x+2)(2)计算:(a²-4/a+2)+a+2计算
计算:(1)(x+1)²-x(x+2) (2)计算:(a²-4/a+2)+a+2
计算:(1)(x+1)²-x(x+2) (2)计算:(a²-4/a+2)+a+2
计算:(1)(x+1)²-x(x+2) (2)计算:(a²-4/a+2)+a+2
(1)原式=x²+2x+1-x²-2x=1
(2)原式=(a+2)(a-2)/(a+2)+a+2
=a-2+a+2
=2a
(1)(x+1)²-x(x+2)=x^2+2x+1-x^2-2x=1
(2)计算:(a²-4/a+2)+a+2=a-2+a+2=2a
(1)1+2x (2)2a