Tính :

a)\(\left(18x^2-8y^2\right):\left(3x+2y\right)\)

b)\(\left(2x^2+4xy+2y^2\right):\left(3x+3y\right)\)

c)\(\left(x^2-49y^2\right):\left(14y-2x\right)\)

Tính :

a)\(\left(2x^4-5x^3+2x^2+2x-1\right):\left(x^2-x-1\right)\)

b)\(\left(2x^3-5x^2+6x-15\right)\left(2x-5\right)\)

c)\(\left(x^4-2x^3+5x-6\right):\left(x-3\right)\)

Tìm a : (\(x^3-5x^2-4x+a\)):\(\left(x+3\right)\)

b)\(\left(x^4-x^3+6x^2-x-a\right):\left(x^2-x+5\right)\)

cho 3y-x=6. tính GTBT

A=\(\dfrac{x}{y-2}+\dfrac{2x-3y}{x-6}\)