化简6×95%×500+6×85%×1000+6×75%×(x-1500)
化简(x+1)(x+2)(x+3)(x+6)-3x平方
x-75%x+85=6/7x
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
化简(-2x^2)+3x+2)-3(7x^2-5x-1)-(4x^2-x+6)
化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)
化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)
化简:x平方-x-2/x平方-x-6除以x平方+4x-5/x平方+2x-10
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
(﹣x+2x²+5)+(4x²-3-6x)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8