x*(x+4)=165

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Solution for x*(x+4)=165 equation:


Simplifying
x(x + 4) = 165

Reorder the terms:
x(4 + x) = 165
(4 * x + x * x) = 165
(4x + x2) = 165

Solving
4x + x2 = 165

Solving for variable 'x'.

Reorder the terms:
-165 + 4x + x2 = 165 + -165

Combine like terms: 165 + -165 = 0
-165 + 4x + x2 = 0

Factor a trinomial.
(-15 + -1x)(11 + -1x) = 0

Subproblem 1

Set the factor '(-15 + -1x)' equal to zero and attempt to solve: Simplifying -15 + -1x = 0 Solving -15 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -1x = 0 + 15 Combine like terms: -15 + 15 = 0 0 + -1x = 0 + 15 -1x = 0 + 15 Combine like terms: 0 + 15 = 15 -1x = 15 Divide each side by '-1'. x = -15 Simplifying x = -15

Subproblem 2

Set the factor '(11 + -1x)' equal to zero and attempt to solve: Simplifying 11 + -1x = 0 Solving 11 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + -1x = 0 + -11 Combine like terms: 11 + -11 = 0 0 + -1x = 0 + -11 -1x = 0 + -11 Combine like terms: 0 + -11 = -11 -1x = -11 Divide each side by '-1'. x = 11 Simplifying x = 11

Solution

x = {-15, 11}

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