x^2-13x+4=17

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Solution for x^2-13x+4=17 equation:


Simplifying
x2 + -13x + 4 = 17

Reorder the terms:
4 + -13x + x2 = 17

Solving
4 + -13x + x2 = 17

Solving for variable 'x'.

Reorder the terms:
4 + -17 + -13x + x2 = 17 + -17

Combine like terms: 4 + -17 = -13
-13 + -13x + x2 = 17 + -17

Combine like terms: 17 + -17 = 0
-13 + -13x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -13x + 13 + x2 = 0 + 13

Reorder the terms:
-13 + 13 + -13x + x2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -13x + x2 = 0 + 13
-13x + x2 = 0 + 13

Combine like terms: 0 + 13 = 13
-13x + x2 = 13

The x term is -13x.  Take half its coefficient (-6.5).
Square it (42.25) and add it to both sides.

Add '42.25' to each side of the equation.
-13x + 42.25 + x2 = 13 + 42.25

Reorder the terms:
42.25 + -13x + x2 = 13 + 42.25

Combine like terms: 13 + 42.25 = 55.25
42.25 + -13x + x2 = 55.25

Factor a perfect square on the left side:
(x + -6.5)(x + -6.5) = 55.25

Calculate the square root of the right side: 7.433034374

Break this problem into two subproblems by setting 
(x + -6.5) equal to 7.433034374 and -7.433034374.

Subproblem 1

x + -6.5 = 7.433034374 Simplifying x + -6.5 = 7.433034374 Reorder the terms: -6.5 + x = 7.433034374 Solving -6.5 + x = 7.433034374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = 7.433034374 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = 7.433034374 + 6.5 x = 7.433034374 + 6.5 Combine like terms: 7.433034374 + 6.5 = 13.933034374 x = 13.933034374 Simplifying x = 13.933034374

Subproblem 2

x + -6.5 = -7.433034374 Simplifying x + -6.5 = -7.433034374 Reorder the terms: -6.5 + x = -7.433034374 Solving -6.5 + x = -7.433034374 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.5' to each side of the equation. -6.5 + 6.5 + x = -7.433034374 + 6.5 Combine like terms: -6.5 + 6.5 = 0.0 0.0 + x = -7.433034374 + 6.5 x = -7.433034374 + 6.5 Combine like terms: -7.433034374 + 6.5 = -0.933034374 x = -0.933034374 Simplifying x = -0.933034374

Solution

The solution to the problem is based on the solutions from the subproblems. x = {13.933034374, -0.933034374}

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