(x+3y)^2-2(x^2-9y^2)+(x-3y)^2

来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 01:47:59
(x+3y)^2-2(x^2-9y^2)+(x-3y)^2
x)Ө6Ԍ35ҨqF`A"}* l(7{:!@ *t*h<5Own~6mI=O[<ӯ UjflV rpqAb6`Ӿ@c5Ք - ׅ"KDrv۲t

(x+3y)^2-2(x^2-9y^2)+(x-3y)^2
(x+3y)^2-2(x^2-9y^2)+(x-3y)^2

(x+3y)^2-2(x^2-9y^2)+(x-3y)^2
(x+3y)^2-2(x^2-9y^2)+(x-3y)^2
=（x+3y）^2-2(x+3y)(x-3y)+(x-3y)^2
=(x+3y-x+3y)^2 (应用平方和公式)
=(6y)^2
=36y^2

原式=(x+3y)²-2(x+3y)(x-3y)+(x-3y)²
=[(x+3y)-(x-3y)]²
=(6y)²
=36y²

x(x-y)2-(y-x)3 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 计算：x+2y/x-y+2x/y-x-3y/x-y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 计算(x-y)^7÷(y-x)^6+9-x-y)^3÷(x+y)^2 化简y(x+y)+(x+y)(x-y)-x^2 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 2X(2X-3Y)-3Y(X+Y) (-2x y)^2-(3y-x)(-x-3y)