28x^4-20x^2=0

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Solution for 28x^4-20x^2=0 equation:


Simplifying
28x4 + -20x2 = 0

Reorder the terms:
-20x2 + 28x4 = 0

Solving
-20x2 + 28x4 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '4x2'.
4x2(-5 + 7x2) = 0

Ignore the factor 4.

Subproblem 1

Set the factor 'x2' equal to zero and attempt to solve: Simplifying x2 = 0 Solving x2 = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x2 = 0 Take the square root of each side: x = {0}

Subproblem 2

Set the factor '(-5 + 7x2)' equal to zero and attempt to solve: Simplifying -5 + 7x2 = 0 Solving -5 + 7x2 = 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 + 7x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + 7x2 = 0 + 5 7x2 = 0 + 5 Combine like terms: 0 + 5 = 5 7x2 = 5 Divide each side by '7'. x2 = 0.7142857143 Simplifying x2 = 0.7142857143 Take the square root of each side: x = {-0.845154255, 0.845154255}

Solution

x = {0, -0.845154255, 0.845154255}

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