-16x^2-11x+100=0

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Solution for -16x^2-11x+100=0 equation:


Simplifying
-16x2 + -11x + 100 = 0

Reorder the terms:
100 + -11x + -16x2 = 0

Solving
100 + -11x + -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'.
-6.25 + 0.6875x + x2 = 0

Move the constant term to the right:

Add '6.25' to each side of the equation.
-6.25 + 0.6875x + 6.25 + x2 = 0 + 6.25

Reorder the terms:
-6.25 + 6.25 + 0.6875x + x2 = 0 + 6.25

Combine like terms: -6.25 + 6.25 = 0.00
0.00 + 0.6875x + x2 = 0 + 6.25
0.6875x + x2 = 0 + 6.25

Combine like terms: 0 + 6.25 = 6.25
0.6875x + x2 = 6.25

The x term is 0.6875x.  Take half its coefficient (0.34375).
Square it (0.1181640625) and add it to both sides.

Add '0.1181640625' to each side of the equation.
0.6875x + 0.1181640625 + x2 = 6.25 + 0.1181640625

Reorder the terms:
0.1181640625 + 0.6875x + x2 = 6.25 + 0.1181640625

Combine like terms: 6.25 + 0.1181640625 = 6.3681640625
0.1181640625 + 0.6875x + x2 = 6.3681640625

Factor a perfect square on the left side:
(x + 0.34375)(x + 0.34375) = 6.3681640625

Calculate the square root of the right side: 2.523522154

Break this problem into two subproblems by setting 
(x + 0.34375) equal to 2.523522154 and -2.523522154.

Subproblem 1

x + 0.34375 = 2.523522154 Simplifying x + 0.34375 = 2.523522154 Reorder the terms: 0.34375 + x = 2.523522154 Solving 0.34375 + x = 2.523522154 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.34375' to each side of the equation. 0.34375 + -0.34375 + x = 2.523522154 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + x = 2.523522154 + -0.34375 x = 2.523522154 + -0.34375 Combine like terms: 2.523522154 + -0.34375 = 2.179772154 x = 2.179772154 Simplifying x = 2.179772154

Subproblem 2

x + 0.34375 = -2.523522154 Simplifying x + 0.34375 = -2.523522154 Reorder the terms: 0.34375 + x = -2.523522154 Solving 0.34375 + x = -2.523522154 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.34375' to each side of the equation. 0.34375 + -0.34375 + x = -2.523522154 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + x = -2.523522154 + -0.34375 x = -2.523522154 + -0.34375 Combine like terms: -2.523522154 + -0.34375 = -2.867272154 x = -2.867272154 Simplifying x = -2.867272154

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.179772154, -2.867272154}

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