Step-by-step explanation:
Simplifying
5 + -2x2 = -15
Solving
5 + -2x2 = -15
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-5' to each side of the equation.
5 + -5 + -2x2 = -15 + -5
Combine like terms: 5 + -5 = 0
0 + -2x2 = -15 + -5
-2x2 = -15 + -5
Combine like terms: -15 + -5 = -20
-2x2 = -20
Divide each side by '-2'.
x2 = 10
Simplifying
x2 = 10
Take the square root of each side:
x = {-3.16227766, 3.16227766}
