4x+5=x^2-7

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Solution for 4x+5=x^2-7 equation:


Simplifying
4x + 5 = x2 + -7

Reorder the terms:
5 + 4x = x2 + -7

Reorder the terms:
5 + 4x = -7 + x2

Solving
5 + 4x = -7 + x2

Solving for variable 'x'.

Reorder the terms:
5 + 7 + 4x + -1x2 = -7 + x2 + 7 + -1x2

Combine like terms: 5 + 7 = 12
12 + 4x + -1x2 = -7 + x2 + 7 + -1x2

Reorder the terms:
12 + 4x + -1x2 = -7 + 7 + x2 + -1x2

Combine like terms: -7 + 7 = 0
12 + 4x + -1x2 = 0 + x2 + -1x2
12 + 4x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
12 + 4x + -1x2 = 0

Factor a trinomial.
(6 + -1x)(2 + x) = 0

Subproblem 1

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Subproblem 2

Set the factor '(2 + x)' equal to zero and attempt to solve: Simplifying 2 + x = 0 Solving 2 + x = 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 + x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0 + -2 x = 0 + -2 Combine like terms: 0 + -2 = -2 x = -2 Simplifying x = -2

Solution

x = {6, -2}

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