x^2+7x-2x-14=26

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Solution for x^2+7x-2x-14=26 equation:


Simplifying
x2 + 7x + -2x + -14 = 26

Reorder the terms:
-14 + 7x + -2x + x2 = 26

Combine like terms: 7x + -2x = 5x
-14 + 5x + x2 = 26

Solving
-14 + 5x + x2 = 26

Solving for variable 'x'.

Reorder the terms:
-14 + -26 + 5x + x2 = 26 + -26

Combine like terms: -14 + -26 = -40
-40 + 5x + x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-40 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '40' to each side of the equation.
-40 + 5x + 40 + x2 = 0 + 40

Reorder the terms:
-40 + 40 + 5x + x2 = 0 + 40

Combine like terms: -40 + 40 = 0
0 + 5x + x2 = 0 + 40
5x + x2 = 0 + 40

Combine like terms: 0 + 40 = 40
5x + x2 = 40

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 40 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 40 + 6.25

Combine like terms: 40 + 6.25 = 46.25
6.25 + 5x + x2 = 46.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 46.25

Calculate the square root of the right side: 6.800735254

Break this problem into two subproblems by setting 
(x + 2.5) equal to 6.800735254 and -6.800735254.

Subproblem 1

x + 2.5 = 6.800735254 Simplifying x + 2.5 = 6.800735254 Reorder the terms: 2.5 + x = 6.800735254 Solving 2.5 + x = 6.800735254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 6.800735254 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 6.800735254 + -2.5 x = 6.800735254 + -2.5 Combine like terms: 6.800735254 + -2.5 = 4.300735254 x = 4.300735254 Simplifying x = 4.300735254

Subproblem 2

x + 2.5 = -6.800735254 Simplifying x + 2.5 = -6.800735254 Reorder the terms: 2.5 + x = -6.800735254 Solving 2.5 + x = -6.800735254 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -6.800735254 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -6.800735254 + -2.5 x = -6.800735254 + -2.5 Combine like terms: -6.800735254 + -2.5 = -9.300735254 x = -9.300735254 Simplifying x = -9.300735254

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.300735254, -9.300735254}

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