The expression $-15x^2 + 58x - 7$ can be written in the form $ax^2 + …

Question

Prompt

The expression

- 15 x^{2} + 58 x - 7

can be written in the form

a x^{2} + b x + c

, where

a

b

, and

c

are constants. What is the value of

a + b