3x^2+2x+8=2(x^2+8)

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Solution for 3x^2+2x+8=2(x^2+8) equation:


Simplifying
3x2 + 2x + 8 = 2(x2 + 8)

Reorder the terms:
8 + 2x + 3x2 = 2(x2 + 8)

Reorder the terms:
8 + 2x + 3x2 = 2(8 + x2)
8 + 2x + 3x2 = (8 * 2 + x2 * 2)
8 + 2x + 3x2 = (16 + 2x2)

Solving
8 + 2x + 3x2 = 16 + 2x2

Solving for variable 'x'.

Reorder the terms:
8 + -16 + 2x + 3x2 + -2x2 = 16 + 2x2 + -16 + -2x2

Combine like terms: 8 + -16 = -8
-8 + 2x + 3x2 + -2x2 = 16 + 2x2 + -16 + -2x2

Combine like terms: 3x2 + -2x2 = 1x2
-8 + 2x + 1x2 = 16 + 2x2 + -16 + -2x2

Reorder the terms:
-8 + 2x + 1x2 = 16 + -16 + 2x2 + -2x2

Combine like terms: 16 + -16 = 0
-8 + 2x + 1x2 = 0 + 2x2 + -2x2
-8 + 2x + 1x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
-8 + 2x + 1x2 = 0

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


Subproblem 1
Set the factor '(-4 + -1x)' equal to zero and attempt to solve:

Simplifying
-4 + -1x = 0

Solving
-4 + -1x = 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 + -1x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1x = 0 + 4
-1x = 0 + 4

Combine like terms: 0 + 4 = 4
-1x = 4

Divide each side by '-1'.
x = -4

Simplifying
x = -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 = {-4, 2}

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