(1)63Xˇ2+22X-8 (2)Xˇ2+x+6yˇ2+3y+5xy (3)Xˇ3(X-2y)+yˇ3(2x-y)
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(1)63Xˇ2+22X-8 (2)Xˇ2+x+6yˇ2+3y+5xy (3)Xˇ3(X-2y)+yˇ3(2x-y)
因式分解
因式分解
(1)63Xˇ2+22X-8
=(7x+4)(9x-2)
(2)Xˇ2+x+6yˇ2+3y+5xy
=(x^2+5xy+6y^2)+(x+3y)
=(x+2y)(x+3y)+(x+3y)
=(x+2y+1)(x+3y)
(3)Xˇ3(X-2y)+yˇ3(2x-y)
=x^4-2x^3y+2xy^3-y^4
=(x^2-y^2)(x^2+y^2)-2xy(x^2-y^2)
=(x^2-y^2)(x^2-2xy+y^2)
=(x^2-y^2)(x-y)^2
=(x+y)(x-y)^3
=(7x+4)(9x-2)
(2)Xˇ2+x+6yˇ2+3y+5xy
=(x^2+5xy+6y^2)+(x+3y)
=(x+2y)(x+3y)+(x+3y)
=(x+2y+1)(x+3y)
(3)Xˇ3(X-2y)+yˇ3(2x-y)
=x^4-2x^3y+2xy^3-y^4
=(x^2-y^2)(x^2+y^2)-2xy(x^2-y^2)
=(x^2-y^2)(x^2-2xy+y^2)
=(x^2-y^2)(x-y)^2
=(x+y)(x-y)^3
(1)63Xˇ2+22X-8 (2)Xˇ2+x+6yˇ2+3y+5xy (3)Xˇ3(X-2y)+yˇ3(2x-y)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
1、(-7x^y)(2x^y-3xy^3+xy) 2、((x-y)^6)/((y-x)^3)/(x-y)
[x(x^2y^2-xy)-y(x^2-x^3y)]/3x^2y
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)
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化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x+y)(x-y)-(2xy+3y)平方
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)
x(x-1)-(x平方-y)=-3,求x平方+y平方-2xy