80x-4x^2=300

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Solution for 80x-4x^2=300 equation:


Simplifying
80x + -4x2 = 300

Solving
80x + -4x2 = 300

Solving for variable 'x'.

Reorder the terms:
-300 + 80x + -4x2 = 300 + -300

Combine like terms: 300 + -300 = 0
-300 + 80x + -4x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-75 + 20x + -1x2) = 0

Factor a trinomial.
4((-15 + x)(5 + -1x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-15 + x)' equal to zero and attempt to solve: Simplifying -15 + x = 0 Solving -15 + x = 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 + x = 0 + 15 Combine like terms: -15 + 15 = 0 0 + x = 0 + 15 x = 0 + 15 Combine like terms: 0 + 15 = 15 x = 15 Simplifying x = 15

Subproblem 2

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

Solution

x = {15, 5}

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