0=3x^2-21x+30

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Solution for 0=3x^2-21x+30 equation:


Simplifying
0 = 3x2 + -21x + 30

Reorder the terms:
0 = 30 + -21x + 3x2

Solving
0 = 30 + -21x + 3x2

Solving for variable 'x'.

Combine like terms: 0 + -30 = -30
-30 + 21x + -3x2 = 30 + -21x + 3x2 + -30 + 21x + -3x2

Reorder the terms:
-30 + 21x + -3x2 = 30 + -30 + -21x + 21x + 3x2 + -3x2

Combine like terms: 30 + -30 = 0
-30 + 21x + -3x2 = 0 + -21x + 21x + 3x2 + -3x2
-30 + 21x + -3x2 = -21x + 21x + 3x2 + -3x2

Combine like terms: -21x + 21x = 0
-30 + 21x + -3x2 = 0 + 3x2 + -3x2
-30 + 21x + -3x2 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-30 + 21x + -3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-10 + 7x + -1x2) = 0

Factor a trinomial.
3((-5 + x)(2 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + x)' equal to zero and attempt to solve: Simplifying -5 + x = 0 Solving -5 + x = 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 + x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + x = 0 + 5 x = 0 + 5 Combine like terms: 0 + 5 = 5 x = 5 Simplifying x = 5

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {5, 2}

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