40X^2=1-X

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Solution for 40X^2=1-X equation:


Simplifying
40X2 = 1 + -1X

Solving
40X2 = 1 + -1X

Solving for variable 'X'.

Reorder the terms:
-1 + X + 40X2 = 1 + -1X + -1 + X

Reorder the terms:
-1 + X + 40X2 = 1 + -1 + -1X + X

Combine like terms: 1 + -1 = 0
-1 + X + 40X2 = 0 + -1X + X
-1 + X + 40X2 = -1X + X

Combine like terms: -1X + X = 0
-1 + X + 40X2 = 0

Begin completing the square.  Divide all terms by
40 the coefficient of the squared term: 

Divide each side by '40'.
-0.025 + 0.025X + X2 = 0

Move the constant term to the right:

Add '0.025' to each side of the equation.
-0.025 + 0.025X + 0.025 + X2 = 0 + 0.025

Reorder the terms:
-0.025 + 0.025 + 0.025X + X2 = 0 + 0.025

Combine like terms: -0.025 + 0.025 = 0.000
0.000 + 0.025X + X2 = 0 + 0.025
0.025X + X2 = 0 + 0.025

Combine like terms: 0 + 0.025 = 0.025
0.025X + X2 = 0.025

The X term is X.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
0.025X + 0.25 + X2 = 0.025 + 0.25

Reorder the terms:
0.25 + 0.025X + X2 = 0.025 + 0.25

Combine like terms: 0.025 + 0.25 = 0.275
0.25 + 0.025X + X2 = 0.275

Factor a perfect square on the left side:
(X + 0.5)(X + 0.5) = 0.275

Calculate the square root of the right side: 0.524404424

Break this problem into two subproblems by setting 
(X + 0.5) equal to 0.524404424 and -0.524404424.

Subproblem 1

X + 0.5 = 0.524404424 Simplifying X + 0.5 = 0.524404424 Reorder the terms: 0.5 + X = 0.524404424 Solving 0.5 + X = 0.524404424 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = 0.524404424 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = 0.524404424 + -0.5 X = 0.524404424 + -0.5 Combine like terms: 0.524404424 + -0.5 = 0.024404424 X = 0.024404424 Simplifying X = 0.024404424

Subproblem 2

X + 0.5 = -0.524404424 Simplifying X + 0.5 = -0.524404424 Reorder the terms: 0.5 + X = -0.524404424 Solving 0.5 + X = -0.524404424 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + X = -0.524404424 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + X = -0.524404424 + -0.5 X = -0.524404424 + -0.5 Combine like terms: -0.524404424 + -0.5 = -1.024404424 X = -1.024404424 Simplifying X = -1.024404424

Solution

The solution to the problem is based on the solutions from the subproblems. X = {0.024404424, -1.024404424}

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