(x-5)(40-x)=124

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Solution for (x-5)(40-x)=124 equation:


Simplifying
(x + -5)(40 + -1x) = 124

Reorder the terms:
(-5 + x)(40 + -1x) = 124

Multiply (-5 + x) * (40 + -1x)
(-5(40 + -1x) + x(40 + -1x)) = 124
((40 * -5 + -1x * -5) + x(40 + -1x)) = 124
((-200 + 5x) + x(40 + -1x)) = 124
(-200 + 5x + (40 * x + -1x * x)) = 124
(-200 + 5x + (40x + -1x2)) = 124

Combine like terms: 5x + 40x = 45x
(-200 + 45x + -1x2) = 124

Solving
-200 + 45x + -1x2 = 124

Solving for variable 'x'.

Reorder the terms:
-200 + -124 + 45x + -1x2 = 124 + -124

Combine like terms: -200 + -124 = -324
-324 + 45x + -1x2 = 124 + -124

Combine like terms: 124 + -124 = 0
-324 + 45x + -1x2 = 0

Factor a trinomial.
(-36 + x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-36 + x)' equal to zero and attempt to solve: Simplifying -36 + x = 0 Solving -36 + x = 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 + x = 0 + 36 Combine like terms: -36 + 36 = 0 0 + x = 0 + 36 x = 0 + 36 Combine like terms: 0 + 36 = 36 x = 36 Simplifying x = 36

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {36, 9}

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