Question

Check:

Simplify 3a^2 + 4a - a^2 + a; then evaluate for a = 5. My answer: 4a^2 + 4a; 25

Thanks :)

Answer 1

its faulty

Answer 2

\(\Large\tt \color{black}{3a^2 + 4a - a^2 + a=2a^2+5a=a(2a+5)}\)

Answer 3

Oh, thank you!