Question

Expand or simplify
3c(5+c) -2(3c-7)​

Answer 1

It is 3c² + 9c + 14

Explanation:

`3c(5 + c) - 2(3c - 7)`

open the brackets:

`= (15c + 3 {c}^(2) ) - (6c - 14) \\ = (15c + {3c}^(2) ) - 6c + 14`

express in quadratic equation:

`3 {c}^(2) + 9c + 14`

Answer 2

3c(5+c) -2(3c-7)
15c+3c^2-6c+14
9c+3c^2+14