21v^2-31=-27v-1

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Solution for 21v^2-31=-27v-1 equation:


Simplifying
21v2 + -31 = -27v + -1

Reorder the terms:
-31 + 21v2 = -27v + -1

Reorder the terms:
-31 + 21v2 = -1 + -27v

Solving
-31 + 21v2 = -1 + -27v

Solving for variable 'v'.

Reorder the terms:
-31 + 1 + 27v + 21v2 = -1 + -27v + 1 + 27v

Combine like terms: -31 + 1 = -30
-30 + 27v + 21v2 = -1 + -27v + 1 + 27v

Reorder the terms:
-30 + 27v + 21v2 = -1 + 1 + -27v + 27v

Combine like terms: -1 + 1 = 0
-30 + 27v + 21v2 = 0 + -27v + 27v
-30 + 27v + 21v2 = -27v + 27v

Combine like terms: -27v + 27v = 0
-30 + 27v + 21v2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-10 + 9v + 7v2) = 0

Factor a trinomial.
3((-2 + -1v)(5 + -7v)) = 0

Ignore the factor 3.

Subproblem 1

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

Subproblem 2

Set the factor '(5 + -7v)' equal to zero and attempt to solve: Simplifying 5 + -7v = 0 Solving 5 + -7v = 0 Move all terms containing v to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -7v = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -7v = 0 + -5 -7v = 0 + -5 Combine like terms: 0 + -5 = -5 -7v = -5 Divide each side by '-7'. v = 0.7142857143 Simplifying v = 0.7142857143

Solution

v = {-2, 0.7142857143}

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