\(=xy\left(x^2-y^2\right)=xy\left(x-y\right)\left(x+y\right)\)
\(=xy\left(x^2-y^2\right)=xy\left(x-y\right)\left(x+y\right)\)
g)(x+3y)(x-3y+2) h)(x+2y((x-2y+3) I)(x^2-xy+y^2)(x+y) J)(x^2-xy+y^2)(x+y) K)(5x-2y)(x^2-xy-1) L)(x^2y^2-xy+y)(x-y)
cho x+y=3 và xy=1. tính A= x^3y+xy^3
1.Rút gọn
a) ( x - 3 ) . ( x + 2) - (2x^3 - 2x^2 - 10x ) : 2x
b) B= ( - 4x^3y^y^2+ x^3y^4 ) : 2xy^2 - xy . ( 2x - xy )
tim x,y thuoc Z xy^3 + x^3y = 6x+3y+4
B1:Pt thành nhân tử
a) 12x^4y^3+12x^3y^3+3x^2y^3
b)x^4+xy^3-x^3y-y^4
Tìm GTNN :
a) C = x^4 - 8xy - x^3y + x^2y^2 - xy^3 + y^4 +212
b) D = (x - 2)(y + 6)xy + 12x^2 - 24x + 3y^2 + 18 y + 36
x^2 + 3.x+3y+xy
\(a.\left(5x^4-3x^3+x^2\right):3x^2=\frac{5}{3}x^2-x+\frac{1}{3}\)
\(b.\left(5xy^2+9xy-x^2y^2\right):\left(-xy\right)=-5y-9+xy\)
\(c.\left(x^3y^3-x^2y^3-x^3y^2\right):x^2y^2=xy-y-x\)
\(\frac{x^3y+xy^3+xy}{x^3+y^3+x^2y+xy^2+x+y}\)
help me,mn giúp mik vs.Mẫu số cuối là y nha