x^2-28x=-49

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Solution for x^2-28x=-49 equation:


Simplifying
x2 + -28x = -49

Reorder the terms:
-28x + x2 = -49

Solving
-28x + x2 = -49

Solving for variable 'x'.

Reorder the terms:
49 + -28x + x2 = -49 + 49

Combine like terms: -49 + 49 = 0
49 + -28x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-49' to each side of the equation.
49 + -28x + -49 + x2 = 0 + -49

Reorder the terms:
49 + -49 + -28x + x2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -28x + x2 = 0 + -49
-28x + x2 = 0 + -49

Combine like terms: 0 + -49 = -49
-28x + x2 = -49

The x term is -28x.  Take half its coefficient (-14).
Square it (196) and add it to both sides.

Add '196' to each side of the equation.
-28x + 196 + x2 = -49 + 196

Reorder the terms:
196 + -28x + x2 = -49 + 196

Combine like terms: -49 + 196 = 147
196 + -28x + x2 = 147

Factor a perfect square on the left side:
(x + -14)(x + -14) = 147

Calculate the square root of the right side: 12.124355653

Break this problem into two subproblems by setting 
(x + -14) equal to 12.124355653 and -12.124355653.

Subproblem 1

x + -14 = 12.124355653 Simplifying x + -14 = 12.124355653 Reorder the terms: -14 + x = 12.124355653 Solving -14 + x = 12.124355653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = 12.124355653 + 14 Combine like terms: -14 + 14 = 0 0 + x = 12.124355653 + 14 x = 12.124355653 + 14 Combine like terms: 12.124355653 + 14 = 26.124355653 x = 26.124355653 Simplifying x = 26.124355653

Subproblem 2

x + -14 = -12.124355653 Simplifying x + -14 = -12.124355653 Reorder the terms: -14 + x = -12.124355653 Solving -14 + x = -12.124355653 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + x = -12.124355653 + 14 Combine like terms: -14 + 14 = 0 0 + x = -12.124355653 + 14 x = -12.124355653 + 14 Combine like terms: -12.124355653 + 14 = 1.875644347 x = 1.875644347 Simplifying x = 1.875644347

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.124355653, 1.875644347}

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