-16x^2+200x+57=0

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Solution for -16x^2+200x+57=0 equation:


Simplifying
-16x2 + 200x + 57 = 0

Reorder the terms:
57 + 200x + -16x2 = 0

Solving
57 + 200x + -16x2 = 0

Solving for variable 'x'.

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

Divide each side by '-16'.
-3.5625 + -12.5x + x2 = 0

Move the constant term to the right:

Add '3.5625' to each side of the equation.
-3.5625 + -12.5x + 3.5625 + x2 = 0 + 3.5625

Reorder the terms:
-3.5625 + 3.5625 + -12.5x + x2 = 0 + 3.5625

Combine like terms: -3.5625 + 3.5625 = 0.0000
0.0000 + -12.5x + x2 = 0 + 3.5625
-12.5x + x2 = 0 + 3.5625

Combine like terms: 0 + 3.5625 = 3.5625
-12.5x + x2 = 3.5625

The x term is -12.5x.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5x + 39.0625 + x2 = 3.5625 + 39.0625

Reorder the terms:
39.0625 + -12.5x + x2 = 3.5625 + 39.0625

Combine like terms: 3.5625 + 39.0625 = 42.625
39.0625 + -12.5x + x2 = 42.625

Factor a perfect square on the left side:
(x + -6.25)(x + -6.25) = 42.625

Calculate the square root of the right side: 6.528782429

Break this problem into two subproblems by setting 
(x + -6.25) equal to 6.528782429 and -6.528782429.

Subproblem 1

x + -6.25 = 6.528782429 Simplifying x + -6.25 = 6.528782429 Reorder the terms: -6.25 + x = 6.528782429 Solving -6.25 + x = 6.528782429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = 6.528782429 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = 6.528782429 + 6.25 x = 6.528782429 + 6.25 Combine like terms: 6.528782429 + 6.25 = 12.778782429 x = 12.778782429 Simplifying x = 12.778782429

Subproblem 2

x + -6.25 = -6.528782429 Simplifying x + -6.25 = -6.528782429 Reorder the terms: -6.25 + x = -6.528782429 Solving -6.25 + x = -6.528782429 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + x = -6.528782429 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + x = -6.528782429 + 6.25 x = -6.528782429 + 6.25 Combine like terms: -6.528782429 + 6.25 = -0.278782429 x = -0.278782429 Simplifying x = -0.278782429

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.778782429, -0.278782429}

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