8=-16x^2+4x+20

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Solution for 8=-16x^2+4x+20 equation:


Simplifying
8 = -16x2 + 4x + 20

Reorder the terms:
8 = 20 + 4x + -16x2

Solving
8 = 20 + 4x + -16x2

Solving for variable 'x'.

Combine like terms: 8 + -20 = -12
-12 + -4x + 16x2 = 20 + 4x + -16x2 + -20 + -4x + 16x2

Reorder the terms:
-12 + -4x + 16x2 = 20 + -20 + 4x + -4x + -16x2 + 16x2

Combine like terms: 20 + -20 = 0
-12 + -4x + 16x2 = 0 + 4x + -4x + -16x2 + 16x2
-12 + -4x + 16x2 = 4x + -4x + -16x2 + 16x2

Combine like terms: 4x + -4x = 0
-12 + -4x + 16x2 = 0 + -16x2 + 16x2
-12 + -4x + 16x2 = -16x2 + 16x2

Combine like terms: -16x2 + 16x2 = 0
-12 + -4x + 16x2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-3 + -1x + 4x2) = 0

Factor a trinomial.
4((-3 + -4x)(1 + -1x)) = 0

Ignore the factor 4.

Subproblem 1

Set the factor '(-3 + -4x)' equal to zero and attempt to solve: Simplifying -3 + -4x = 0 Solving -3 + -4x = 0 Move all terms containing x to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + -4x = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -4x = 0 + 3 -4x = 0 + 3 Combine like terms: 0 + 3 = 3 -4x = 3 Divide each side by '-4'. x = -0.75 Simplifying x = -0.75

Subproblem 2

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

Solution

x = {-0.75, 1}

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