Question

( \(x^2\) + 7x + 10 ) : ( x + 2 )

Answer 1

\(\dfrac{x^2+7x+10}{x+2}\)

\(=\dfrac{x^2+2x+5x+10}{x+2}\)

\(=\dfrac{x\left(x+2\right)+5\left(x+2\right)}{x+2}\)

=x+5

Answer 2

Ta có: \(x^2+7x+10\)

\(=x^2+2x+5x+10\)

\(=x\left(x+2\right)+5\left(x+2\right)\)

\(=\left(x+2\right)\left(x+5\right)\)

\(\Rightarrow\left(x^2+7x+10\right):\left(x+2\right)=x+5\)