Question

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

Answer 1

\(a.\left(18x^2-8y^2\right):\left(3x+2y\right)=2\left(9x^2-4y^2\right):\left(3x+2y\right)=2\left(3x-2y\right)\left(3x+2y\right):\left(3x+2y\right)=2\left(3x-2y\right)\) \(b.\left(2x^2+4xy+2y^2\right):\left(3x+3y\right)=2\left(x+y\right)^2:3\left(x+y\right)=\dfrac{2\left(x+y\right)}{3}\) \(c.\left(x^2-49y^2\right):\left(14y-2x\right)=\left(x-7y\right)\left(x+7y\right):-2\left(x-7y\right)=-\dfrac{x+7y}{2}\)