Im so confused can someone btw the top is

This one is for #5

Simplifying

x2 = 225

Solving

x2 = 225

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Simplifying

x2 = 225

Take the square root of each side:

x = {-15, 15}

This one is for #6

22x2 -  49  = 0

Factoring:  4x2-49

(2x + 7) • (2x - 7)  = 0

Solve  :    2x+7 = 0

Subtract  7  from both sides of the equation :

                     2x = -7

Divide both sides of the equation by 2:

                    x = -7/2 = -3.500

Solve  :    2x-7 = 0

Add  7  to both sides of the equation :

                     2x = 7

Divide both sides of the equation by 2:

                    x = 7/2 = 3.500

x = 7/2 = 3.500

x = -7/2 = -3.500

the answer is a

step-by-step explanation: