Question

I need to know the answer

Answer 1

A

Explanation:

That's the formula for the solution of a quadratic equation, like this:

`a {x}^(2) + bx + c = 0`

The formula is:

`x = \frac{ - b± \sqrt{ {b}^(2) \: - 4ac } }{2a}`

In your case:

`a = 7 \\ b = - 5 \\ c = - 2`

The only answer that has c = -2 is the first one, A.

If you move the 5 to the left-hand side, it becomes -5 and with the +3 gives a -2.