Question

Giúp mình với nha!!!!

Answer 1

\(=\left(2x^2+4x-9x-18+20\right):\left(x+2\right)\\ =\left[2x\left(x+2\right)-9\left(x+2\right)+20\right]:\left(x+2\right)\\ =2x-9\left(\text{dư }20\right)\)

Answer 2

\(\left(2x^2-5x+2\right):\left(x+2\right)=\left(2x-9\right)+\dfrac{20}{x+2}.\)

Answer 3