问题
解答题
计算: (1)(2a)3•b4÷12a3b2; (2)x(x+2)-(x+1)(x-1); (3)
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答案
(1)原式=8a3b4÷12a3b2=
b2;2 3
(2)原式=x2+2x-(x2-1)=2x+1;
(3)原式=-2+3-(2-
)=-1+3
.3
计算: (1)(2a)3•b4÷12a3b2; (2)x(x+2)-(x+1)(x-1); (3)
|
(1)原式=8a3b4÷12a3b2=
b2;2 3
(2)原式=x2+2x-(x2-1)=2x+1;
(3)原式=-2+3-(2-
)=-1+3
.3