\(\dfrac{x^2-xy}{5y^2-5xy}=\dfrac{x\left(x-y\right)}{5y\left(y-x\right)}=\dfrac{-x\left(y-x\right)}{5y\left(y-x\right)}=\dfrac{-x}{5y}\)
\(A=x^5y^2+7x^2y^4+5xy^3+xy+2\)
\(B=x^2y^4+5xy^3+x^5y^2\)
Tính A-B
Cho 2 đa thức
\(A=x^5y^2+7x^2y^4+5xy^3+xy+2\)
\(B=x^2y^4+5xy^3+x^5y^2\)
Tính A+B
phân tích thành nhân tử
\(xy-3x-y^2 +3y\)
\(x^2 +2x-xy-2y\)
\(x^2 +5xy+x+5y\)
rút gọn phân thức:
\(\frac{x^2-xy-x+y}{x^2+xy-x-y}\) \(\frac{x^2-xy}{5y^2-5xy}\)
\(a.\left(5x^4-3x^3+x^2\right):3x^2=\frac{5}{3}x^2-x+\frac{1}{3}\)
\(b.\left(5xy^2+9xy-x^2y^2\right):\left(-xy\right)=-5y-9+xy\)
\(c.\left(x^3y^3-x^2y^3-x^3y^2\right):x^2y^2=xy-y-x\)
1) Rút gọn phân thức \(\frac{6x^2y^2}{8xy^5}\); \(\frac{x^2-xy}{5xy-5y^2}\)
:(( helppp
Rút gọn rồi tính: \(B=\frac{\left(x+5y\right)\left(x-5y\right)}{x^2+y^2}\left(\frac{5x-y}{x^2+5xy}+\frac{5x+y}{x^2-5xy}\right)\)
PP nhóm hạng tử chung
1)2x+2y-x(x+y)
2)5x^2-5xy-10x+10y
3)4x^2+8xy-3x-6y
4)2x^2+2y^2-x^2z+z-y^2z-2
5)x^2+xy-5x-5y
6)x(2x-7)-4x+14
7)x^2-3x+xy-3y
a/ 2x3 (2xy + 6x5y) b/ 3 1 x 5y 3 ( 4xy2 + 3x + 1) c/ 4 1 x 3yz (-2x2y 4 – 5xy) d/ (2x3 + 5y2 )(4xy3 + 1) e/ (5x – 2y)(x2 – xy + 1) f/ (x – 1)(x + 1)(x + 2)
