Answer:
The correct answer is a.
Step-by-step explanation:
To solve this expression, we first multiply the negative sign into the expression and we get :
[tex]5x^{2} +7-3x+2[/tex]
we only need to add the coefficients of constants then
[tex]5x^{2} -3x+(7+2)[/tex]
[tex]5x^{2} -3x+9[/tex] and we get the correct answer!
