计算2(x-1)²-1=17,(2x-1)³-1=7
计算2x/(x³-1)÷1/(x²+x+1)=
计算:(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9
计算:1/(x^2-7x+10)+1/(x^2-x-2)+1/(x^2+5x+4)+1/(x^2+11x+28)=( )
计算5x(2x² -3x+1)
计算 x(x+3)-(x-1)(x-2)
(2x+19)/(5x²-5)-17/(x²-1)-3/(1-x)=0计算
2x+19/(5x²-5)-17/(x²-1)-3/(1-x)=0计算
计算:(1/x²-4x+4)-(x/x²-4)+(1/2x+4)=
(x³-1)÷(x-1)=?(9x³-6x²-5x+2)÷(3x-1)=?计算
计算:(1)(-2X²)³×(-2X)³-X³×【(-2X)²】
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2
计算(-x³+2x²-5)(2x²-3x+1)