8v^4-14v^2-15=0

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Solution for 8v^4-14v^2-15=0 equation:


Simplifying
8v4 + -14v2 + -15 = 0

Reorder the terms:
-15 + -14v2 + 8v4 = 0

Solving
-15 + -14v2 + 8v4 = 0

Solving for variable 'v'.

Factor a trinomial.
(-3 + -4v2)(5 + -2v2) = 0

Subproblem 1

Set the factor '(-3 + -4v2)' equal to zero and attempt to solve: Simplifying -3 + -4v2 = 0 Solving -3 + -4v2 = 0 Move all terms containing v to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4v2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4v2 = 0 + 3 -4v2 = 0 + 3 Combine like terms: 0 + 3 = 3 -4v2 = 3 Divide each side by '-4'. v2 = -0.75 Simplifying v2 = -0.75 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(5 + -2v2)' equal to zero and attempt to solve: Simplifying 5 + -2v2 = 0 Solving 5 + -2v2 = 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 + -2v2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2v2 = 0 + -5 -2v2 = 0 + -5 Combine like terms: 0 + -5 = -5 -2v2 = -5 Divide each side by '-2'. v2 = 2.5 Simplifying v2 = 2.5 Take the square root of each side: v = {-1.58113883, 1.58113883}

Solution

v = {-1.58113883, 1.58113883}

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