(16x^2)-40x=23

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Solution for (16x^2)-40x=23 equation:


Simplifying
(16x2) + -40x = 23

Reorder the terms:
-40x + (16x2) = 23

Solving
-40x + (16x2) = 23

Solving for variable 'x'.

Reorder the terms:
-23 + -40x + (16x2) = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + -40x + (16x2) = 0

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

Divide each side by '16'.
-1.4375 + -2.5x + x2 = 0

Move the constant term to the right:

Add '1.4375' to each side of the equation.
-1.4375 + -2.5x + 1.4375 + x2 = 0 + 1.4375

Reorder the terms:
-1.4375 + 1.4375 + -2.5x + x2 = 0 + 1.4375

Combine like terms: -1.4375 + 1.4375 = 0.0000
0.0000 + -2.5x + x2 = 0 + 1.4375
-2.5x + x2 = 0 + 1.4375

Combine like terms: 0 + 1.4375 = 1.4375
-2.5x + x2 = 1.4375

The x term is -2.5x.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5x + 1.5625 + x2 = 1.4375 + 1.5625

Reorder the terms:
1.5625 + -2.5x + x2 = 1.4375 + 1.5625

Combine like terms: 1.4375 + 1.5625 = 3
1.5625 + -2.5x + x2 = 3

Factor a perfect square on the left side:
((x) + -1.25)((x) + -1.25) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
((x) + -1.25) equal to 1.732050808 and -1.732050808.

Subproblem 1

(x) + -1.25 = 1.732050808 Simplifying (x) + -1.25 = 1.732050808 x + -1.25 = 1.732050808 Reorder the terms: -1.25 + x = 1.732050808 Solving -1.25 + x = 1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = 1.732050808 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = 1.732050808 + 1.25 x = 1.732050808 + 1.25 Combine like terms: 1.732050808 + 1.25 = 2.982050808 x = 2.982050808 Simplifying x = 2.982050808

Subproblem 2

(x) + -1.25 = -1.732050808 Simplifying (x) + -1.25 = -1.732050808 x + -1.25 = -1.732050808 Reorder the terms: -1.25 + x = -1.732050808 Solving -1.25 + x = -1.732050808 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + x = -1.732050808 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + x = -1.732050808 + 1.25 x = -1.732050808 + 1.25 Combine like terms: -1.732050808 + 1.25 = -0.482050808 x = -0.482050808 Simplifying x = -0.482050808

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.982050808, -0.482050808}

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