x^2-28x+98=72

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Solution for x^2-28x+98=72 equation:


Simplifying
x2 + -28x + 98 = 72

Reorder the terms:
98 + -28x + x2 = 72

Solving
98 + -28x + x2 = 72

Solving for variable 'x'.

Reorder the terms:
98 + -72 + -28x + x2 = 72 + -72

Combine like terms: 98 + -72 = 26
26 + -28x + x2 = 72 + -72

Combine like terms: 72 + -72 = 0
26 + -28x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-26' to each side of the equation.
26 + -28x + -26 + x2 = 0 + -26

Reorder the terms:
26 + -26 + -28x + x2 = 0 + -26

Combine like terms: 26 + -26 = 0
0 + -28x + x2 = 0 + -26
-28x + x2 = 0 + -26

Combine like terms: 0 + -26 = -26
-28x + x2 = -26

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 = -26 + 196

Reorder the terms:
196 + -28x + x2 = -26 + 196

Combine like terms: -26 + 196 = 170
196 + -28x + x2 = 170

Factor a perfect square on the left side:
(x + -14)(x + -14) = 170

Calculate the square root of the right side: 13.03840481

Break this problem into two subproblems by setting 
(x + -14) equal to 13.03840481 and -13.03840481.

Subproblem 1

x + -14 = 13.03840481 Simplifying x + -14 = 13.03840481 Reorder the terms: -14 + x = 13.03840481 Solving -14 + x = 13.03840481 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 = 13.03840481 + 14 Combine like terms: -14 + 14 = 0 0 + x = 13.03840481 + 14 x = 13.03840481 + 14 Combine like terms: 13.03840481 + 14 = 27.03840481 x = 27.03840481 Simplifying x = 27.03840481

Subproblem 2

x + -14 = -13.03840481 Simplifying x + -14 = -13.03840481 Reorder the terms: -14 + x = -13.03840481 Solving -14 + x = -13.03840481 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 = -13.03840481 + 14 Combine like terms: -14 + 14 = 0 0 + x = -13.03840481 + 14 x = -13.03840481 + 14 Combine like terms: -13.03840481 + 14 = 0.96159519 x = 0.96159519 Simplifying x = 0.96159519

Solution

The solution to the problem is based on the solutions from the subproblems. x = {27.03840481, 0.96159519}

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