x=4x^2+76x-1160

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Solution for x=4x^2+76x-1160 equation:


Simplifying
x = 4x2 + 76x + -1160

Reorder the terms:
x = -1160 + 76x + 4x2

Solving
x = -1160 + 76x + 4x2

Solving for variable 'x'.

Reorder the terms:
1160 + x + -76x + -4x2 = -1160 + 76x + 4x2 + 1160 + -76x + -4x2

Combine like terms: x + -76x = -75x
1160 + -75x + -4x2 = -1160 + 76x + 4x2 + 1160 + -76x + -4x2

Reorder the terms:
1160 + -75x + -4x2 = -1160 + 1160 + 76x + -76x + 4x2 + -4x2

Combine like terms: -1160 + 1160 = 0
1160 + -75x + -4x2 = 0 + 76x + -76x + 4x2 + -4x2
1160 + -75x + -4x2 = 76x + -76x + 4x2 + -4x2

Combine like terms: 76x + -76x = 0
1160 + -75x + -4x2 = 0 + 4x2 + -4x2
1160 + -75x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
1160 + -75x + -4x2 = 0

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

Divide each side by '-4'.
-290 + 18.75x + x2 = 0

Move the constant term to the right:

Add '290' to each side of the equation.
-290 + 18.75x + 290 + x2 = 0 + 290

Reorder the terms:
-290 + 290 + 18.75x + x2 = 0 + 290

Combine like terms: -290 + 290 = 0
0 + 18.75x + x2 = 0 + 290
18.75x + x2 = 0 + 290

Combine like terms: 0 + 290 = 290
18.75x + x2 = 290

The x term is 18.75x.  Take half its coefficient (9.375).
Square it (87.890625) and add it to both sides.

Add '87.890625' to each side of the equation.
18.75x + 87.890625 + x2 = 290 + 87.890625

Reorder the terms:
87.890625 + 18.75x + x2 = 290 + 87.890625

Combine like terms: 290 + 87.890625 = 377.890625
87.890625 + 18.75x + x2 = 377.890625

Factor a perfect square on the left side:
(x + 9.375)(x + 9.375) = 377.890625

Calculate the square root of the right side: 19.43940907

Break this problem into two subproblems by setting 
(x + 9.375) equal to 19.43940907 and -19.43940907.

Subproblem 1

x + 9.375 = 19.43940907 Simplifying x + 9.375 = 19.43940907 Reorder the terms: 9.375 + x = 19.43940907 Solving 9.375 + x = 19.43940907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.375' to each side of the equation. 9.375 + -9.375 + x = 19.43940907 + -9.375 Combine like terms: 9.375 + -9.375 = 0.000 0.000 + x = 19.43940907 + -9.375 x = 19.43940907 + -9.375 Combine like terms: 19.43940907 + -9.375 = 10.06440907 x = 10.06440907 Simplifying x = 10.06440907

Subproblem 2

x + 9.375 = -19.43940907 Simplifying x + 9.375 = -19.43940907 Reorder the terms: 9.375 + x = -19.43940907 Solving 9.375 + x = -19.43940907 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9.375' to each side of the equation. 9.375 + -9.375 + x = -19.43940907 + -9.375 Combine like terms: 9.375 + -9.375 = 0.000 0.000 + x = -19.43940907 + -9.375 x = -19.43940907 + -9.375 Combine like terms: -19.43940907 + -9.375 = -28.81440907 x = -28.81440907 Simplifying x = -28.81440907

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.06440907, -28.81440907}

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