x(x+3)=x^2+12

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Solution for x(x+3)=x^2+12 equation: 


Simplifying
x(x + 3) = x2 + 12

Reorder the terms:
x(3 + x) = x2 + 12
(3 * x + x * x) = x2 + 12
(3x + x2) = x2 + 12

Reorder the terms:
3x + x2 = 12 + x2

Add '-1x2' to each side of the equation.
3x + x2 + -1x2 = 12 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3x + 0 = 12 + x2 + -1x2
3x = 12 + x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3x = 12 + 0
3x = 12

Solving
3x = 12

Solving for variable 'x'.

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

Divide each side by '3'.
x = 4

Simplifying
x = 4

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