2x^2-24x=-7

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Solution for 2x^2-24x=-7 equation:


Simplifying
2x2 + -24x = -7

Reorder the terms:
-24x + 2x2 = -7

Solving
-24x + 2x2 = -7

Solving for variable 'x'.

Reorder the terms:
7 + -24x + 2x2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + -24x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
3.5 + -12x + x2 = 0

Move the constant term to the right:

Add '-3.5' to each side of the equation.
3.5 + -12x + -3.5 + x2 = 0 + -3.5

Reorder the terms:
3.5 + -3.5 + -12x + x2 = 0 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + -12x + x2 = 0 + -3.5
-12x + x2 = 0 + -3.5

Combine like terms: 0 + -3.5 = -3.5
-12x + x2 = -3.5

The x term is -12x.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12x + 36 + x2 = -3.5 + 36

Reorder the terms:
36 + -12x + x2 = -3.5 + 36

Combine like terms: -3.5 + 36 = 32.5
36 + -12x + x2 = 32.5

Factor a perfect square on the left side:
(x + -6)(x + -6) = 32.5

Calculate the square root of the right side: 5.700877125

Break this problem into two subproblems by setting 
(x + -6) equal to 5.700877125 and -5.700877125.

Subproblem 1

x + -6 = 5.700877125 Simplifying x + -6 = 5.700877125 Reorder the terms: -6 + x = 5.700877125 Solving -6 + x = 5.700877125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 5.700877125 + 6 Combine like terms: -6 + 6 = 0 0 + x = 5.700877125 + 6 x = 5.700877125 + 6 Combine like terms: 5.700877125 + 6 = 11.700877125 x = 11.700877125 Simplifying x = 11.700877125

Subproblem 2

x + -6 = -5.700877125 Simplifying x + -6 = -5.700877125 Reorder the terms: -6 + x = -5.700877125 Solving -6 + x = -5.700877125 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -5.700877125 + 6 Combine like terms: -6 + 6 = 0 0 + x = -5.700877125 + 6 x = -5.700877125 + 6 Combine like terms: -5.700877125 + 6 = 0.299122875 x = 0.299122875 Simplifying x = 0.299122875

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.700877125, 0.299122875}

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