9x^2+60x=21

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Solution for 9x^2+60x=21 equation:


Simplifying
9x2 + 60x = 21

Reorder the terms:
60x + 9x2 = 21

Solving
60x + 9x2 = 21

Solving for variable 'x'.

Reorder the terms:
-21 + 60x + 9x2 = 21 + -21

Combine like terms: 21 + -21 = 0
-21 + 60x + 9x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-7 + 20x + 3x2) = 0

Factor a trinomial.
3((-7 + -1x)(1 + -3x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-7 + -1x)' equal to zero and attempt to solve: Simplifying -7 + -1x = 0 Solving -7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + -1x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + -1x = 0 + 7 -1x = 0 + 7 Combine like terms: 0 + 7 = 7 -1x = 7 Divide each side by '-1'. x = -7 Simplifying x = -7

Subproblem 2

Set the factor '(1 + -3x)' equal to zero and attempt to solve: Simplifying 1 + -3x = 0 Solving 1 + -3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + -3x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -3x = 0 + -1 -3x = 0 + -1 Combine like terms: 0 + -1 = -1 -3x = -1 Divide each side by '-3'. x = 0.3333333333 Simplifying x = 0.3333333333

Solution

x = {-7, 0.3333333333}

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