2×(-1/2)³-3×(-1/2)²+3×(-1/2)-1
(-2分之1)²+(-0.25)³×8-(-3分之2)³
(-3)³-(-2)³-2²+0×103×(-4分之1)
4x³-(3x²+2x-2)+2(3x+3/2x²-2x³)-1,其中x等于50
若x²-2x-1=0,求2x³-3x²-4x+2的值
2x³ +3x²-1因式分解
(1)(-1)的5次方×{[-4又3分之2÷(-2)²+(-12.5)×(-0.4)]÷(-9分之1)-3
-(1-0.5)÷1/3×【2+(-4)²】
分式的通分和约分通分:1/x²+x,1/x²-x 约分:(一)x²-3/2x³-
已知函数f(x)=3x³+2x,x∈(-1,1),试求不等式f(a²-1)+f(1-
计算下面各题.)(1)(-2²)-▏-7▏+3-2×(-2分之1)(2)-9÷3+(2分之1-3分之2)×12
-1²×(-3)²-(-2分之1)²ºº³×(-2)
x²-3x+1=0.求2x³-3x²-7x+2009