x^2-40x+10=0

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Solution for x^2-40x+10=0 equation:


Simplifying
x2 + -40x + 10 = 0

Reorder the terms:
10 + -40x + x2 = 0

Solving
10 + -40x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-10' to each side of the equation.
10 + -40x + -10 + x2 = 0 + -10

Reorder the terms:
10 + -10 + -40x + x2 = 0 + -10

Combine like terms: 10 + -10 = 0
0 + -40x + x2 = 0 + -10
-40x + x2 = 0 + -10

Combine like terms: 0 + -10 = -10
-40x + x2 = -10

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -10 + 400

Reorder the terms:
400 + -40x + x2 = -10 + 400

Combine like terms: -10 + 400 = 390
400 + -40x + x2 = 390

Factor a perfect square on the left side:
(x + -20)(x + -20) = 390

Calculate the square root of the right side: 19.748417658

Break this problem into two subproblems by setting 
(x + -20) equal to 19.748417658 and -19.748417658.

Subproblem 1

x + -20 = 19.748417658 Simplifying x + -20 = 19.748417658 Reorder the terms: -20 + x = 19.748417658 Solving -20 + x = 19.748417658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 19.748417658 + 20 Combine like terms: -20 + 20 = 0 0 + x = 19.748417658 + 20 x = 19.748417658 + 20 Combine like terms: 19.748417658 + 20 = 39.748417658 x = 39.748417658 Simplifying x = 39.748417658

Subproblem 2

x + -20 = -19.748417658 Simplifying x + -20 = -19.748417658 Reorder the terms: -20 + x = -19.748417658 Solving -20 + x = -19.748417658 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -19.748417658 + 20 Combine like terms: -20 + 20 = 0 0 + x = -19.748417658 + 20 x = -19.748417658 + 20 Combine like terms: -19.748417658 + 20 = 0.251582342 x = 0.251582342 Simplifying x = 0.251582342

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.748417658, 0.251582342}

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