3x^2+8x=80

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Solution for 3x^2+8x=80 equation:


Simplifying
3x2 + 8x = 80

Reorder the terms:
8x + 3x2 = 80

Solving
8x + 3x2 = 80

Solving for variable 'x'.

Reorder the terms:
-80 + 8x + 3x2 = 80 + -80

Combine like terms: 80 + -80 = 0
-80 + 8x + 3x2 = 0

Factor a trinomial.
(-20 + -3x)(4 + -1x) = 0

Subproblem 1

Set the factor '(-20 + -3x)' equal to zero and attempt to solve: Simplifying -20 + -3x = 0 Solving -20 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -3x = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -3x = 0 + 20 -3x = 0 + 20 Combine like terms: 0 + 20 = 20 -3x = 20 Divide each side by '-3'. x = -6.666666667 Simplifying x = -6.666666667

Subproblem 2

Set the factor '(4 + -1x)' equal to zero and attempt to solve: Simplifying 4 + -1x = 0 Solving 4 + -1x = 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 + -1x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1x = 0 + -4 -1x = 0 + -4 Combine like terms: 0 + -4 = -4 -1x = -4 Divide each side by '-1'. x = 4 Simplifying x = 4

Solution

x = {-6.666666667, 4}

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