28x^2-8=2x

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Solution for 28x^2-8=2x equation:


Simplifying
28x2 + -8 = 2x

Reorder the terms:
-8 + 28x2 = 2x

Solving
-8 + 28x2 = 2x

Solving for variable 'x'.

Reorder the terms:
-8 + -2x + 28x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-8 + -2x + 28x2 = 0

Factor out the Greatest Common Factor (GCF), '2'.
2(-4 + -1x + 14x2) = 0

Factor a trinomial.
2((-1 + -2x)(4 + -7x)) = 0

Ignore the factor 2.

Subproblem 1

Set the factor '(-1 + -2x)' equal to zero and attempt to solve: Simplifying -1 + -2x = 0 Solving -1 + -2x = 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 + -2x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -2x = 0 + 1 -2x = 0 + 1 Combine like terms: 0 + 1 = 1 -2x = 1 Divide each side by '-2'. x = -0.5 Simplifying x = -0.5

Subproblem 2

Set the factor '(4 + -7x)' equal to zero and attempt to solve: Simplifying 4 + -7x = 0 Solving 4 + -7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -7x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -7x = 0 + -4 -7x = 0 + -4 Combine like terms: 0 + -4 = -4 -7x = -4 Divide each side by '-7'. x = 0.5714285714 Simplifying x = 0.5714285714

Solution

x = {-0.5, 0.5714285714}

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