4x^2-30x-74=0

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Solution for 4x^2-30x-74=0 equation: 


Simplifying
4x2 + -30x + -74 = 0

Reorder the terms:
-74 + -30x + 4x2 = 0

Solving
-74 + -30x + 4x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '2'.
2(-37 + -15x + 2x2) = 0

Ignore the factor 2.

Subproblem 1
Set the factor '(-37 + -15x + 2x2)' equal to zero and attempt to solve:

Simplifying
-37 + -15x + 2x2 = 0

Solving
-37 + -15x + 2x2 = 0

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

Divide each side by '2'.
-18.5 + -7.5x + x2 = 0

Move the constant term to the right:

Add '18.5' to each side of the equation.
-18.5 + -7.5x + 18.5 + x2 = 0 + 18.5

Reorder the terms:
-18.5 + 18.5 + -7.5x + x2 = 0 + 18.5

Combine like terms: -18.5 + 18.5 = 0.0
0.0 + -7.5x + x2 = 0 + 18.5
-7.5x + x2 = 0 + 18.5

Combine like terms: 0 + 18.5 = 18.5
-7.5x + x2 = 18.5

The x term is -7.5x.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5x + 14.0625 + x2 = 18.5 + 14.0625

Reorder the terms:
14.0625 + -7.5x + x2 = 18.5 + 14.0625

Combine like terms: 18.5 + 14.0625 = 32.5625
14.0625 + -7.5x + x2 = 32.5625

Factor a perfect square on the left side:
(x + -3.75)(x + -3.75) = 32.5625

Calculate the square root of the right side: 5.706356105

Break this problem into two subproblems by setting 
(x + -3.75) equal to 5.706356105 and -5.706356105.


Subproblem 1
x + -3.75 = 5.706356105

Simplifying
x + -3.75 = 5.706356105

Reorder the terms:
-3.75 + x = 5.706356105

Solving
-3.75 + x = 5.706356105

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.75' to each side of the equation.
-3.75 + 3.75 + x = 5.706356105 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + x = 5.706356105 + 3.75
x = 5.706356105 + 3.75

Combine like terms: 5.706356105 + 3.75 = 9.456356105
x = 9.456356105

Simplifying
x = 9.456356105


Subproblem 2
x + -3.75 = -5.706356105

Simplifying
x + -3.75 = -5.706356105

Reorder the terms:
-3.75 + x = -5.706356105

Solving
-3.75 + x = -5.706356105

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '3.75' to each side of the equation.
-3.75 + 3.75 + x = -5.706356105 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + x = -5.706356105 + 3.75
x = -5.706356105 + 3.75

Combine like terms: -5.706356105 + 3.75 = -1.956356105
x = -1.956356105

Simplifying
x = -1.956356105


Solution
The solution to the problem is based on the solutions
from the subproblems.
x = {9.456356105, -1.956356105}
Solution
x = {9.456356105, -1.956356105}

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