x^2-47x+15=0

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Solution for x^2-47x+15=0 equation:


Simplifying
x2 + -47x + 15 = 0

Reorder the terms:
15 + -47x + x2 = 0

Solving
15 + -47x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + -47x + -15 + x2 = 0 + -15

Reorder the terms:
15 + -15 + -47x + x2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + -47x + x2 = 0 + -15
-47x + x2 = 0 + -15

Combine like terms: 0 + -15 = -15
-47x + x2 = -15

The x term is -47x.  Take half its coefficient (-23.5).
Square it (552.25) and add it to both sides.

Add '552.25' to each side of the equation.
-47x + 552.25 + x2 = -15 + 552.25

Reorder the terms:
552.25 + -47x + x2 = -15 + 552.25

Combine like terms: -15 + 552.25 = 537.25
552.25 + -47x + x2 = 537.25

Factor a perfect square on the left side:
(x + -23.5)(x + -23.5) = 537.25

Calculate the square root of the right side: 23.178653973

Break this problem into two subproblems by setting 
(x + -23.5) equal to 23.178653973 and -23.178653973.

Subproblem 1

x + -23.5 = 23.178653973 Simplifying x + -23.5 = 23.178653973 Reorder the terms: -23.5 + x = 23.178653973 Solving -23.5 + x = 23.178653973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '23.5' to each side of the equation. -23.5 + 23.5 + x = 23.178653973 + 23.5 Combine like terms: -23.5 + 23.5 = 0.0 0.0 + x = 23.178653973 + 23.5 x = 23.178653973 + 23.5 Combine like terms: 23.178653973 + 23.5 = 46.678653973 x = 46.678653973 Simplifying x = 46.678653973

Subproblem 2

x + -23.5 = -23.178653973 Simplifying x + -23.5 = -23.178653973 Reorder the terms: -23.5 + x = -23.178653973 Solving -23.5 + x = -23.178653973 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '23.5' to each side of the equation. -23.5 + 23.5 + x = -23.178653973 + 23.5 Combine like terms: -23.5 + 23.5 = 0.0 0.0 + x = -23.178653973 + 23.5 x = -23.178653973 + 23.5 Combine like terms: -23.178653973 + 23.5 = 0.321346027 x = 0.321346027 Simplifying x = 0.321346027

Solution

The solution to the problem is based on the solutions from the subproblems. x = {46.678653973, 0.321346027}

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