(1)(1-25%)x=72 (2)x-40%x=5.04 (3)x÷(1-40%)=3.6 (4) 34 x-25%x
(1)(1-25%)x=72 (2)x-40%x=5.04 (3)x÷(1-40%)=3.6 (4) 34 x-25%x
化简求值 :2x(x²-x+1)-x(2x²+2x-3) x=﹣二分之一
已知x²-3x+1=0,求式子(x+1+x-1分之2)÷x-1分之x的值.
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
用公式法解下列方程x²-4x+1=0-5x²-3x+2=02(x²-2)+2x=x(3x-
函数配方f(X)=-2X²+3X-2,f(X)=3X²+6X-1
3x-4(2x+5)=7(x-5)+4(2x+1)
解方程:x(2X-3)+2x(x-1)=4x(x-2)+9
x(2x-1)=-3x(x+1)+5x²+3
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
计算:2x/(x-2)(x+1)÷(1-x/x+1)-x²+2x/x²-4?