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Simplifying
7 + -5x2 + 8 = 0
Reorder the terms:
7 + 8 + -5x2 = 0
Combine like terms: 7 + 8 = 15
15 + -5x2 = 0
Solving
15 + -5x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-15' to each side of the equation.
15 + -15 + -5x2 = 0 + -15
Combine like terms: 15 + -15 = 0
0 + -5x2 = 0 + -15
-5x2 = 0 + -15
Combine like terms: 0 + -15 = -15
-5x2 = -15
Divide each side by '-5'.
x2 = 3
Simplifying
x2 = 3
Take the square root of each side:
x = {-1.732050808, 1.732050808}
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