0=4x^2-53x-74

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Solution for 0=4x^2-53x-74 equation:


Simplifying
0 = 4x2 + -53x + -74

Reorder the terms:
0 = -74 + -53x + 4x2

Solving
0 = -74 + -53x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + 74 = 74
74 + 53x + -4x2 = -74 + -53x + 4x2 + 74 + 53x + -4x2

Reorder the terms:
74 + 53x + -4x2 = -74 + 74 + -53x + 53x + 4x2 + -4x2

Combine like terms: -74 + 74 = 0
74 + 53x + -4x2 = 0 + -53x + 53x + 4x2 + -4x2
74 + 53x + -4x2 = -53x + 53x + 4x2 + -4x2

Combine like terms: -53x + 53x = 0
74 + 53x + -4x2 = 0 + 4x2 + -4x2
74 + 53x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
74 + 53x + -4x2 = 0

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

Divide each side by '-4'.
-18.5 + -13.25x + x2 = 0

Move the constant term to the right:

Add '18.5' to each side of the equation.
-18.5 + -13.25x + 18.5 + x2 = 0 + 18.5

Reorder the terms:
-18.5 + 18.5 + -13.25x + x2 = 0 + 18.5

Combine like terms: -18.5 + 18.5 = 0.0
0.0 + -13.25x + x2 = 0 + 18.5
-13.25x + x2 = 0 + 18.5

Combine like terms: 0 + 18.5 = 18.5
-13.25x + x2 = 18.5

The x term is -13.25x.  Take half its coefficient (-6.625).
Square it (43.890625) and add it to both sides.

Add '43.890625' to each side of the equation.
-13.25x + 43.890625 + x2 = 18.5 + 43.890625

Reorder the terms:
43.890625 + -13.25x + x2 = 18.5 + 43.890625

Combine like terms: 18.5 + 43.890625 = 62.390625
43.890625 + -13.25x + x2 = 62.390625

Factor a perfect square on the left side:
(x + -6.625)(x + -6.625) = 62.390625

Calculate the square root of the right side: 7.898773639

Break this problem into two subproblems by setting 
(x + -6.625) equal to 7.898773639 and -7.898773639.

Subproblem 1

x + -6.625 = 7.898773639 Simplifying x + -6.625 = 7.898773639 Reorder the terms: -6.625 + x = 7.898773639 Solving -6.625 + x = 7.898773639 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.625' to each side of the equation. -6.625 + 6.625 + x = 7.898773639 + 6.625 Combine like terms: -6.625 + 6.625 = 0.000 0.000 + x = 7.898773639 + 6.625 x = 7.898773639 + 6.625 Combine like terms: 7.898773639 + 6.625 = 14.523773639 x = 14.523773639 Simplifying x = 14.523773639

Subproblem 2

x + -6.625 = -7.898773639 Simplifying x + -6.625 = -7.898773639 Reorder the terms: -6.625 + x = -7.898773639 Solving -6.625 + x = -7.898773639 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.625' to each side of the equation. -6.625 + 6.625 + x = -7.898773639 + 6.625 Combine like terms: -6.625 + 6.625 = 0.000 0.000 + x = -7.898773639 + 6.625 x = -7.898773639 + 6.625 Combine like terms: -7.898773639 + 6.625 = -1.273773639 x = -1.273773639 Simplifying x = -1.273773639

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.523773639, -1.273773639}

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