40x^2-x-24=0

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Solution for 40x^2-x-24=0 equation:


Simplifying
40x2 + -1x + -24 = 0

Reorder the terms:
-24 + -1x + 40x2 = 0

Solving
-24 + -1x + 40x2 = 0

Solving for variable 'x'.

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

Divide each side by '40'.
-0.6 + -0.025x + x2 = 0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -0.025x + 0.6 + x2 = 0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -0.025x + x2 = 0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -0.025x + x2 = 0 + 0.6
-0.025x + x2 = 0 + 0.6

Combine like terms: 0 + 0.6 = 0.6
-0.025x + x2 = 0.6

The x term is -0.025x.  Take half its coefficient (-0.0125).
Square it (0.00015625) and add it to both sides.

Add '0.00015625' to each side of the equation.
-0.025x + 0.00015625 + x2 = 0.6 + 0.00015625

Reorder the terms:
0.00015625 + -0.025x + x2 = 0.6 + 0.00015625

Combine like terms: 0.6 + 0.00015625 = 0.60015625
0.00015625 + -0.025x + x2 = 0.60015625

Factor a perfect square on the left side:
(x + -0.0125)(x + -0.0125) = 0.60015625

Calculate the square root of the right side: 0.774697522

Break this problem into two subproblems by setting 
(x + -0.0125) equal to 0.774697522 and -0.774697522.

Subproblem 1

x + -0.0125 = 0.774697522 Simplifying x + -0.0125 = 0.774697522 Reorder the terms: -0.0125 + x = 0.774697522 Solving -0.0125 + x = 0.774697522 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0125' to each side of the equation. -0.0125 + 0.0125 + x = 0.774697522 + 0.0125 Combine like terms: -0.0125 + 0.0125 = 0.0000 0.0000 + x = 0.774697522 + 0.0125 x = 0.774697522 + 0.0125 Combine like terms: 0.774697522 + 0.0125 = 0.787197522 x = 0.787197522 Simplifying x = 0.787197522

Subproblem 2

x + -0.0125 = -0.774697522 Simplifying x + -0.0125 = -0.774697522 Reorder the terms: -0.0125 + x = -0.774697522 Solving -0.0125 + x = -0.774697522 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.0125' to each side of the equation. -0.0125 + 0.0125 + x = -0.774697522 + 0.0125 Combine like terms: -0.0125 + 0.0125 = 0.0000 0.0000 + x = -0.774697522 + 0.0125 x = -0.774697522 + 0.0125 Combine like terms: -0.774697522 + 0.0125 = -0.762197522 x = -0.762197522 Simplifying x = -0.762197522

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.787197522, -0.762197522}

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