x^2=18-3x

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Solution for x^2=18-3x equation:


Simplifying
x2 = 18 + -3x

Solving
x2 = 18 + -3x

Solving for variable 'x'.

Reorder the terms:
-18 + 3x + x2 = 18 + -3x + -18 + 3x

Reorder the terms:
-18 + 3x + x2 = 18 + -18 + -3x + 3x

Combine like terms: 18 + -18 = 0
-18 + 3x + x2 = 0 + -3x + 3x
-18 + 3x + x2 = -3x + 3x

Combine like terms: -3x + 3x = 0
-18 + 3x + x2 = 0

Factor a trinomial.
(-6 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-6 + -1x)' equal to zero and attempt to solve: Simplifying -6 + -1x = 0 Solving -6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x = 0 + 6 -1x = 0 + 6 Combine like terms: 0 + 6 = 6 -1x = 6 Divide each side by '-1'. x = -6 Simplifying x = -6

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-6, 3}

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