Which are the solutions of the quadratic equation?
x2 = 7x + 4

third option.

Step-by-step explanation:

Move the and to the left side of the equation:

Now you need to apply  the Quadratic formula:

In this case you can identify that:

Then you can substitute values into the Quadratic formula and get the following solutions:

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign