分解因式9(x-y)^2-4(x+y)^2
9(x+y)²-4(x-y)²=[3(x+y)+2(x-y)][3(x+y)-2(x-y)]=(5x+y)(x+5y)
平方差分解9(x-y)的平方减去4(x+y)的平方等于多少?)
9(x-y)^2-4(x+y)^2 =[3(x-y)]^2-[2(x+y)]^2 =(3x-3y)^2-(2x+2y)^2 =(3x-3y+2x+2y)(3x-3y-2x-2y)=(5x-y)(x-5y)
9(x-y)的平方—4(x+y)的平方 怎么解?
解:9(x-y)的平方—4(x+y)的平方=[3(x-y)]^2-[2(x+y)]^2 =[3(x-y)+2(x+y)][3(x-y)-2(x+y)]=[3x-3y+2x+2y][3x-3y-2x-2y]=[5x-y][x-5y]=(5x-y)(x-5y)
9(x-y)的平方-4(2x+y)的平方
9(x-y)的平方-4(2x+y)的平方 =9(x-y)²-4(2x+y)²=【3(x-y)】²-【2(2x+y)】²=【3(x-y)+2(2x+y)】【3(x-y)-2(2x+y)】=(7x-y)(-x-5y)
因式分解9(x一y)^2-4(x y)^2
9 (x-y)平方 -4 (xy)平方 =(3(x-y)+2xy) (3(x-y)-2xy)=(3x+2xy-3y)(3x-2xy-3y)
9(x-y)²-4(x+y)²分解因式
9×(x平方-2xy+y平方)-4(x平方+2xy+ y平方 )=9乘以x平方-18xy+9乘以y平方-4乘以x平方-8xy-4乘以y平方 =5乘以x平方-26xy-5乘以y平方
9(x+y) 2 -4(x-y) 2 .
原式=[3(x+y)] 2 -[2(x-y)] 2 , =[3(x+y)-2(x-y)][3(x+y)+2(x-y)], =(x+5y)(5x+y).
分解因式:9(x+2y)-4(2x+y)的平方。急阿阿阿阿,
9(x+2y)的平方-4(2x+y)的平方 =[3(x+2y)]²-[2(2x+y)]²=(3x+6y+4x+2y)(3x+6y-4x-2y)=(7x+8y)(-x+4y)=-(7x+8y)(x-4y)4(x-2y)的平-4x(x-2y)+x的平方 =[2(x-2y)-x]²=(x-4y)²...
对(y^2)\/(2•根号下(4-2y))的积分,谢谢,
9(x+y)2-4(x-y)2 =(3(x+y))2 -(2(x-y))2 =(3x+3y-2x+2y)(3x+3y+2x-2y) =(x+5y)(5x+y) =5x2+26xy+5y2
(x-y)^2(x+y)^2,要过程
回答:(x-y)^2(x+y)^2 =【(x-y)(x+y)]^2 =(x^2-y^2)^2 =X^4-2X^2Y^2+Y^4