共50条信息
计算题
\((2)a·{a}^{2}·{a}^{3}+{\left({a}^{3}\right)}^{2}-{\left(-2{a}^{2}\right)}^{3} \)
\(⑵\)\({\left(-2{a}^{5}\right)}^{2}-{a}^{2}·3{a}^{8}+{a}^{14}÷\left(-{a}^{4}\right) \)
先化简,再求值:\(2a\left(1-a\right)-\left(a+2\right)\left(a-2\right)+{\left(1-a\right)}^{2} \),其中\(a=-1\) .
图\(1\) 图\(2\)
先化简,再求值:\(\left[ {{\left( 2x+y \right)}^{2}}+\left( y+2x \right)\left( y-2x \right)-2y\left( 4x-y \right) \right]\div \left( 4y \right)\),求当\(x=2\),\(y=3\)时的值。
计算:
\((2){{\left( -2{{a}^{3}} \right)}^{2}}-3{{a}^{3}}\cdot {{a}^{5}}\div {{a}^{2}}\).
已知\(n^{2}+n= 1\),求\((n+2)(n−2) + (n+ 3)(2n− 3)\)的值.
\((1)(\dfrac{1}{2} )^{-3}-2016^{0}-|-5|\);
\((2)(3a^{2})^{2}-a^{2}⋅2a^{2}+(-2a^{3})^{2}÷a^{2}\).
进入组卷