2x^2+56=x^2+15x

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Solution for 2x^2+56=x^2+15x equation:


Simplifying
2x2 + 56 = x2 + 15x

Reorder the terms:
56 + 2x2 = x2 + 15x

Reorder the terms:
56 + 2x2 = 15x + x2

Solving
56 + 2x2 = 15x + x2

Solving for variable 'x'.

Reorder the terms:
56 + -15x + 2x2 + -1x2 = 15x + x2 + -15x + -1x2

Combine like terms: 2x2 + -1x2 = 1x2
56 + -15x + 1x2 = 15x + x2 + -15x + -1x2

Reorder the terms:
56 + -15x + 1x2 = 15x + -15x + x2 + -1x2

Combine like terms: 15x + -15x = 0
56 + -15x + 1x2 = 0 + x2 + -1x2
56 + -15x + 1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
56 + -15x + 1x2 = 0

Factor a trinomial.
(7 + -1x)(8 + -1x) = 0

Subproblem 1

Set the factor '(7 + -1x)' equal to zero and attempt to solve: Simplifying 7 + -1x = 0 Solving 7 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1x = 0 + -7 -1x = 0 + -7 Combine like terms: 0 + -7 = -7 -1x = -7 Divide each side by '-1'. x = 7 Simplifying x = 7

Subproblem 2

Set the factor '(8 + -1x)' equal to zero and attempt to solve: Simplifying 8 + -1x = 0 Solving 8 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -1x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -1x = 0 + -8 -1x = 0 + -8 Combine like terms: 0 + -8 = -8 -1x = -8 Divide each side by '-1'. x = 8 Simplifying x = 8

Solution

x = {7, 8}

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