(15)(18)=120+x^2

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Solution for (15)(18)=120+x^2 equation: 


Simplifying
(15)(18) = 120 + x2

Multiply 15 * 18
270 = 120 + x2

Solving
270 = 120 + x2

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1x2' to each side of the equation.
270 + -1x2 = 120 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
270 + -1x2 = 120 + 0
270 + -1x2 = 120

Add '-270' to each side of the equation.
270 + -270 + -1x2 = 120 + -270

Combine like terms: 270 + -270 = 0
0 + -1x2 = 120 + -270
-1x2 = 120 + -270

Combine like terms: 120 + -270 = -150
-1x2 = -150

Divide each side by '-1'.
x2 = 150

Simplifying
x2 = 150

Take the square root of each side:
x = {-12.247448714, 12.247448714}

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