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
