4x^2-40x-375=0

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Solution for 4x^2-40x-375=0 equation:


Simplifying
4x2 + -40x + -375 = 0

Reorder the terms:
-375 + -40x + 4x2 = 0

Solving
-375 + -40x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-93.75 + -10x + x2 = 0

Move the constant term to the right:

Add '93.75' to each side of the equation.
-93.75 + -10x + 93.75 + x2 = 0 + 93.75

Reorder the terms:
-93.75 + 93.75 + -10x + x2 = 0 + 93.75

Combine like terms: -93.75 + 93.75 = 0.00
0.00 + -10x + x2 = 0 + 93.75
-10x + x2 = 0 + 93.75

Combine like terms: 0 + 93.75 = 93.75
-10x + x2 = 93.75

The x term is -10x.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10x + 25 + x2 = 93.75 + 25

Reorder the terms:
25 + -10x + x2 = 93.75 + 25

Combine like terms: 93.75 + 25 = 118.75
25 + -10x + x2 = 118.75

Factor a perfect square on the left side:
(x + -5)(x + -5) = 118.75

Calculate the square root of the right side: 10.897247359

Break this problem into two subproblems by setting 
(x + -5) equal to 10.897247359 and -10.897247359.

Subproblem 1

x + -5 = 10.897247359 Simplifying x + -5 = 10.897247359 Reorder the terms: -5 + x = 10.897247359 Solving -5 + x = 10.897247359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = 10.897247359 + 5 Combine like terms: -5 + 5 = 0 0 + x = 10.897247359 + 5 x = 10.897247359 + 5 Combine like terms: 10.897247359 + 5 = 15.897247359 x = 15.897247359 Simplifying x = 15.897247359

Subproblem 2

x + -5 = -10.897247359 Simplifying x + -5 = -10.897247359 Reorder the terms: -5 + x = -10.897247359 Solving -5 + x = -10.897247359 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + x = -10.897247359 + 5 Combine like terms: -5 + 5 = 0 0 + x = -10.897247359 + 5 x = -10.897247359 + 5 Combine like terms: -10.897247359 + 5 = -5.897247359 x = -5.897247359 Simplifying x = -5.897247359

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.897247359, -5.897247359}

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