Respuesta :

explanation

3x(5+x) - 2x(3x-7)

open the brackets, we have

15x + 3x^2 - 6x^2 + 14x

collect like terms

3x^2 - 6x^2 +15x + 14x

-3x^2 + 29x

answer= -3x^2 + 29x

birnersadie
The answer is -3x^2+29x