15x^2+55x=100

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Solution for 15x^2+55x=100 equation:


Simplifying
15x2 + 55x = 100

Reorder the terms:
55x + 15x2 = 100

Solving
55x + 15x2 = 100

Solving for variable 'x'.

Reorder the terms:
-100 + 55x + 15x2 = 100 + -100

Combine like terms: 100 + -100 = 0
-100 + 55x + 15x2 = 0

Factor out the Greatest Common Factor (GCF), '5'.
5(-20 + 11x + 3x2) = 0

Factor a trinomial.
5((-5 + -1x)(4 + -3x)) = 0

Ignore the factor 5.

Subproblem 1

Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5

Subproblem 2

Set the factor '(4 + -3x)' equal to zero and attempt to solve: Simplifying 4 + -3x = 0 Solving 4 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -3x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -3x = 0 + -4 -3x = 0 + -4 Combine like terms: 0 + -4 = -4 -3x = -4 Divide each side by '-3'. x = 1.333333333 Simplifying x = 1.333333333

Solution

x = {-5, 1.333333333}

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