(18+x)*(15+x)=378

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Solution for (18+x)*(15+x)=378 equation:


Simplifying
(18 + x)(15 + x) = 378

Multiply (18 + x) * (15 + x)
(18(15 + x) + x(15 + x)) = 378
((15 * 18 + x * 18) + x(15 + x)) = 378
((270 + 18x) + x(15 + x)) = 378
(270 + 18x + (15 * x + x * x)) = 378
(270 + 18x + (15x + x2)) = 378

Combine like terms: 18x + 15x = 33x
(270 + 33x + x2) = 378

Solving
270 + 33x + x2 = 378

Solving for variable 'x'.

Reorder the terms:
270 + -378 + 33x + x2 = 378 + -378

Combine like terms: 270 + -378 = -108
-108 + 33x + x2 = 378 + -378

Combine like terms: 378 + -378 = 0
-108 + 33x + x2 = 0

Factor a trinomial.
(-36 + -1x)(3 + -1x) = 0

Subproblem 1

Set the factor '(-36 + -1x)' equal to zero and attempt to solve: Simplifying -36 + -1x = 0 Solving -36 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '36' to each side of the equation. -36 + 36 + -1x = 0 + 36 Combine like terms: -36 + 36 = 0 0 + -1x = 0 + 36 -1x = 0 + 36 Combine like terms: 0 + 36 = 36 -1x = 36 Divide each side by '-1'. x = -36 Simplifying x = -36

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 = {-36, 3}

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