5x^2-4=8x

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Solution for 5x^2-4=8x equation:


Simplifying
5x2 + -4 = 8x

Reorder the terms:
-4 + 5x2 = 8x

Solving
-4 + 5x2 = 8x

Solving for variable 'x'.

Reorder the terms:
-4 + -8x + 5x2 = 8x + -8x

Combine like terms: 8x + -8x = 0
-4 + -8x + 5x2 = 0

Factor a trinomial.
(-2 + -5x)(2 + -1x) = 0

Subproblem 1

Set the factor '(-2 + -5x)' equal to zero and attempt to solve: Simplifying -2 + -5x = 0 Solving -2 + -5x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -5x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -5x = 0 + 2 -5x = 0 + 2 Combine like terms: 0 + 2 = 2 -5x = 2 Divide each side by '-5'. x = -0.4 Simplifying x = -0.4

Subproblem 2

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

Solution

x = {-0.4, 2}

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