0=-3x^2+66x-255

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Solution for 0=-3x^2+66x-255 equation:


Simplifying
0 = -3x2 + 66x + -255

Reorder the terms:
0 = -255 + 66x + -3x2

Solving
0 = -255 + 66x + -3x2

Solving for variable 'x'.

Combine like terms: 0 + 255 = 255
255 + -66x + 3x2 = -255 + 66x + -3x2 + 255 + -66x + 3x2

Reorder the terms:
255 + -66x + 3x2 = -255 + 255 + 66x + -66x + -3x2 + 3x2

Combine like terms: -255 + 255 = 0
255 + -66x + 3x2 = 0 + 66x + -66x + -3x2 + 3x2
255 + -66x + 3x2 = 66x + -66x + -3x2 + 3x2

Combine like terms: 66x + -66x = 0
255 + -66x + 3x2 = 0 + -3x2 + 3x2
255 + -66x + 3x2 = -3x2 + 3x2

Combine like terms: -3x2 + 3x2 = 0
255 + -66x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(85 + -22x + x2) = 0

Factor a trinomial.
3((5 + -1x)(17 + -1x)) = 0

Ignore the factor 3.

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 '(17 + -1x)' equal to zero and attempt to solve: Simplifying 17 + -1x = 0 Solving 17 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-17' to each side of the equation. 17 + -17 + -1x = 0 + -17 Combine like terms: 17 + -17 = 0 0 + -1x = 0 + -17 -1x = 0 + -17 Combine like terms: 0 + -17 = -17 -1x = -17 Divide each side by '-1'. x = 17 Simplifying x = 17

Solution

x = {5, 17}

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