共50条信息
\((1)\)若\(x\geqslant 1\),化简\(A+B\);
\((2)\)若\(x < 1\),化简\(A+B\).
已知,关于\(x\),\(y\)的方程组\(\begin{cases} x-y=a+3, \\ 2x+y=5a \end{cases}\)解满足\(x > y > 0\).
\((1)\) 求\(a\)的取值范围; \((2)\)化简:\(\left| \left. a \right. \right|-\left| \left. 2-a \right. \right|\).
已知\(a\),\(b\),\(c\)是\({\triangle }ABC\)的三条边长,化简\({|}a{+}b{-}c{|}{-}{|}c{-}a{-}b{|}\)的结果为____________________
计算\({{\left( -3 \right)}^{2n+1}}+3\times {{\left( -3 \right)}^{2n}}\),结果正确的是\(…………………………………\) \((\) \()\)
化简
\((1)2x+(5x-3y)-(3x+y)\)
\((2)3(4x^{2}-3x+2)-2(1-4x^{2}-x)\)
进入组卷