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Simplifying
-3x2 + 15 = 0
Reorder the terms:
15 + -3x2 = 0
Solving
15 + -3x2 = 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 + -3x2 = 0 + -15
Combine like terms: 15 + -15 = 0
0 + -3x2 = 0 + -15
-3x2 = 0 + -15
Combine like terms: 0 + -15 = -15
-3x2 = -15
Divide each side by '-3'.
x2 = 5
Simplifying
x2 = 5
Take the square root of each side:
x = {-2.236067978, 2.236067978}
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