4x^2+2xy-2y^2+4x+7y-3

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/06/01 08:31:34

4x^2+2xy-2y^2+4x+7y-3
分解因式:4X^2+2XY-2Y^2+4X+7Y-3
=4X^2+(2XY+4X)-(2Y^2-7Y+3)
=4X^2+(2Y+4)X-(2Y-1)(Y-3)
=(2X+2Y-1)(2X-Y+3)
其中=4X^2+(2Y+4)X-(2Y-1)(Y-3)之后该怎么做?

4X^2+2XY-2Y^2+4X+7Y-3
=4X^2+(2XY+4X)-(2Y^2-7Y+3)
=4X^2+(2Y+4)X-(2Y-1)(Y-3)(十字相乘)
2X 2Y-1
2X -(Y-3)
=(2X+2Y-1)(2X-Y+3)

x^3y(-4y)^2+(-7xy)^2*(-xy)-5xy^3*(-3x)^2 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8 xy=-2,x+y=3,求代数式（4xy+12y)+[7x-(3xy+4y-x)] （-3x^y+2xy)-( )=4x^+xy x^2y+4xy+4y 已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)} [-(x-y)^2/xy]^-4*(y^2-xy/x)^3*(x^4/y^10)÷(xy-y^2/x)^-5=-y(y- 1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y) (x^-4y^)/(x^+2xy+y^)/(x+2y)/(2x^+2xy) 已知x-y=4xy，则2x+3xy-2yx-2xy-y (2x²y-3xy²)-3(x²y-2xy²)+2（x²y-4xy&#