x^2+7x-27=5

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Solution for x^2+7x-27=5 equation:


Simplifying
x2 + 7x + -27 = 5

Reorder the terms:
-27 + 7x + x2 = 5

Solving
-27 + 7x + x2 = 5

Solving for variable 'x'.

Reorder the terms:
-27 + -5 + 7x + x2 = 5 + -5

Combine like terms: -27 + -5 = -32
-32 + 7x + x2 = 5 + -5

Combine like terms: 5 + -5 = 0
-32 + 7x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '32' to each side of the equation.
-32 + 7x + 32 + x2 = 0 + 32

Reorder the terms:
-32 + 32 + 7x + x2 = 0 + 32

Combine like terms: -32 + 32 = 0
0 + 7x + x2 = 0 + 32
7x + x2 = 0 + 32

Combine like terms: 0 + 32 = 32
7x + x2 = 32

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 32 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 32 + 12.25

Combine like terms: 32 + 12.25 = 44.25
12.25 + 7x + x2 = 44.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 44.25

Calculate the square root of the right side: 6.652067348

Break this problem into two subproblems by setting 
(x + 3.5) equal to 6.652067348 and -6.652067348.

Subproblem 1

x + 3.5 = 6.652067348 Simplifying x + 3.5 = 6.652067348 Reorder the terms: 3.5 + x = 6.652067348 Solving 3.5 + x = 6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 6.652067348 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 6.652067348 + -3.5 x = 6.652067348 + -3.5 Combine like terms: 6.652067348 + -3.5 = 3.152067348 x = 3.152067348 Simplifying x = 3.152067348

Subproblem 2

x + 3.5 = -6.652067348 Simplifying x + 3.5 = -6.652067348 Reorder the terms: 3.5 + x = -6.652067348 Solving 3.5 + x = -6.652067348 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -6.652067348 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -6.652067348 + -3.5 x = -6.652067348 + -3.5 Combine like terms: -6.652067348 + -3.5 = -10.152067348 x = -10.152067348 Simplifying x = -10.152067348

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.152067348, -10.152067348}

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