Question

If 5x² + 7x = 6, which statement is correct?

A)
X= 2 or x= 3/5
x = -2 or x= 3/5
x = 2 or x =-3/5
x = -2 or x = -3/5

Answer 1

The correct answer is x=-2 or x=3/5. I found this answer by using an app called Photomath, you should download it. it really helped me :)

Answer 2

2nd choice: x = -2 or x= 3/5

Explanation:

5x² + 7x = 6

We can solve.

5xx + 7x - 6 = 0

try the diamond method first

-30 = 5*-6.... -3*10 = -30 and -3x + 10x = 7x

So...

5xx - 3x + 10x - 6 = 0

x(5x - 3) + 2(5x - 3) = 0

(x +2)(5x - 3) = 0

roots x = -2 and x = +3/5