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Simplifying
-3x2 + 45 = 0
Reorder the terms:
45 + -3x2 = 0
Solving
45 + -3x2 = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-45' to each side of the equation.
45 + -45 + -3x2 = 0 + -45
Combine like terms: 45 + -45 = 0
0 + -3x2 = 0 + -45
-3x2 = 0 + -45
Combine like terms: 0 + -45 = -45
-3x2 = -45
Divide each side by '-3'.
x2 = 15
Simplifying
x2 = 15
Take the square root of each side:
x = {-3.872983346, 3.872983346}
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