(-3x∧2 -4y∧2)( )=16y∧4-9x∧4,填补括号
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
3(x-y)²×[-4/15(y-x)³][-3/2(x-y)∧4]
已知2x-y=10 求代数式[(x∧2+y∧2)-(x-y)∧2+2y(x-y)]÷4y的值
用代入消元法解下列方程组:(1)大括号x-3y=2 y=x (2)x+y=5 2x+y=8 (3)4x+3y=5 x-2
用代入消元法解下列方程组 (1)大括号x-3y=2 y=x (2)x+y=5 2x+y=8 (3)4x+3y=5 x-2
数学去括号化简,(1)8x-(-3x-5)(2)1-(x-2y^2)+(-x+y^2)(3)(4y+3)-(5y-2)(
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
已知2x-y=10,求:中括号(x²+y²)-(x-y)²+2y(x-y)中括号,÷4y的
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
因式分解:16(x+ y)∧2 +121(x-y)∧2-88(x +y)(x-y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
已知实数x、y满足x∧2+y∧2+2x-4y+5=0,求x、y的值