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Simplifying
9x2 + -4 = 121
Reorder the terms:
-4 + 9x2 = 121
Solving
-4 + 9x2 = 121
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '4' to each side of the equation.
-4 + 4 + 9x2 = 121 + 4
Combine like terms: -4 + 4 = 0
0 + 9x2 = 121 + 4
9x2 = 121 + 4
Combine like terms: 121 + 4 = 125
9x2 = 125
Divide each side by '9'.
x2 = 13.88888889
Simplifying
x2 = 13.88888889
Take the square root of each side:
x = {-3.726779963, 3.726779963}
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