x^2-8x-5=100

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Solution for x^2-8x-5=100 equation:


Simplifying
x2 + -8x + -5 = 100

Reorder the terms:
-5 + -8x + x2 = 100

Solving
-5 + -8x + x2 = 100

Solving for variable 'x'.

Reorder the terms:
-5 + -100 + -8x + x2 = 100 + -100

Combine like terms: -5 + -100 = -105
-105 + -8x + x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-105 + -8x + x2 = 0

Factor a trinomial.
(-7 + -1x)(15 + -1x) = 0

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

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

Solution

x = {-7, 15}

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