Question

Expand or simplify 3c(5+c) -2(3c-7)​

Answer 1

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

Answer 2

Answer:

It is 3c² + 9c + 14

Step-by-step 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:

$3 {c}^{2} + 9c + 14$