X^2-40X+3=0

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Solution for X^2-40X+3=0 equation:


Simplifying
X2 + -40X + 3 = 0

Reorder the terms:
3 + -40X + X2 = 0

Solving
3 + -40X + X2 = 0

Solving for variable 'X'.

Begin completing the square.

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + -40X + -3 + X2 = 0 + -3

Reorder the terms:
3 + -3 + -40X + X2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + -40X + X2 = 0 + -3
-40X + X2 = 0 + -3

Combine like terms: 0 + -3 = -3
-40X + X2 = -3

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 = -3 + 400

Reorder the terms:
400 + -40X + X2 = -3 + 400

Combine like terms: -3 + 400 = 397
400 + -40X + X2 = 397

Factor a perfect square on the left side:
(X + -20)(X + -20) = 397

Calculate the square root of the right side: 19.924858845

Break this problem into two subproblems by setting 
(X + -20) equal to 19.924858845 and -19.924858845.

Subproblem 1

X + -20 = 19.924858845 Simplifying X + -20 = 19.924858845 Reorder the terms: -20 + X = 19.924858845 Solving -20 + X = 19.924858845 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 = 19.924858845 + 20 Combine like terms: -20 + 20 = 0 0 + X = 19.924858845 + 20 X = 19.924858845 + 20 Combine like terms: 19.924858845 + 20 = 39.924858845 X = 39.924858845 Simplifying X = 39.924858845

Subproblem 2

X + -20 = -19.924858845 Simplifying X + -20 = -19.924858845 Reorder the terms: -20 + X = -19.924858845 Solving -20 + X = -19.924858845 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 = -19.924858845 + 20 Combine like terms: -20 + 20 = 0 0 + X = -19.924858845 + 20 X = -19.924858845 + 20 Combine like terms: -19.924858845 + 20 = 0.075141155 X = 0.075141155 Simplifying X = 0.075141155

Solution

The solution to the problem is based on the solutions from the subproblems. X = {39.924858845, 0.075141155}

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