填空1.(3x-1)(4x+5)2.(-4x-y)(-5x+2y)3.(x+3)(x+4)-(X-1)(X-2)4.(y
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(3x-y)²-2x(4x-5y)-(x+2y)²
去括号并合并同类项(1)3x-2(x+7)+2(2x+5) (2)(4x-3y)-[-(3y-x)+(x-y)]-5x
化简1) (-2x^ y^)(3x^ y^)(-4x^ y^)2) (6√x)\(3√x√x^5)3)已知函数f(x)的
计算 1.(-2x)^3-3x乘(x-2x^2) 2.【(x+2y)^2-(x-2y)(x+2y)】÷4y
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
(x+y)-(x+y)平方 因式分解 解方程 2x²=3x (3x-1)² - 4=0 5x-15x
已知实数x满足x+1/x=3,求x-1/x的值 如果x平方+y平方-4x-2y+5=0,则(根号x)+y/(根号x)-y
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
化简求值8x的平方-5x(4y-x)+4x ×(-4x+5/2y)x=1 y=3
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)