1 ,化简（x-y)(x+y)

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/09/23 01:21:56

1 ,化简（x-y)(x+y)
2 ,化简（x+3)的2次方
3 ,化简（x-1)(x-2)
4 ,√25的值

（x-y)(x+y)=x²-y²
（x+3)²=x²+6x+9
(x-1)(x-2)=x²-3x+2
√25=5

1 ,化简（x-y)(x+y) 1、x(x-y)(x+y)-x(x+y)^2 (1)(x^2/x)-y-x-y 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 化简：[(2x-y)平方+（2x+y)(2x-y)-4x(x-y+1)]÷2x {(x,y) |x|+|y| x>y?x:y [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方化简：（2x-y)²-4(x-y)(x+y) 化简xy-1-x+y 1、(x-2y)(x+y)

1 ,化简 （x-y)(x+y)

1 ,化简（x-y)(x+y)