20v^2-84v-84=-4

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Solution for 20v^2-84v-84=-4 equation:


Simplifying
20v2 + -84v + -84 = -4

Reorder the terms:
-84 + -84v + 20v2 = -4

Solving
-84 + -84v + 20v2 = -4

Solving for variable 'v'.

Reorder the terms:
-84 + 4 + -84v + 20v2 = -4 + 4

Combine like terms: -84 + 4 = -80
-80 + -84v + 20v2 = -4 + 4

Combine like terms: -4 + 4 = 0
-80 + -84v + 20v2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-20 + -21v + 5v2) = 0

Factor a trinomial.
4((-4 + -5v)(5 + -1v)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-4 + -5v)' equal to zero and attempt to solve: Simplifying -4 + -5v = 0 Solving -4 + -5v = 0 Move all terms containing v to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -5v = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -5v = 0 + 4 -5v = 0 + 4 Combine like terms: 0 + 4 = 4 -5v = 4 Divide each side by '-5'. v = -0.8 Simplifying v = -0.8

Subproblem 2

Set the factor '(5 + -1v)' equal to zero and attempt to solve: Simplifying 5 + -1v = 0 Solving 5 + -1v = 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 + -1v = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1v = 0 + -5 -1v = 0 + -5 Combine like terms: 0 + -5 = -5 -1v = -5 Divide each side by '-1'. v = 5 Simplifying v = 5

Solution

v = {-0.8, 5}

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