16x^2+11x-26=0

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Solution for 16x^2+11x-26=0 equation:


Simplifying
16x2 + 11x + -26 = 0

Reorder the terms:
-26 + 11x + 16x2 = 0

Solving
-26 + 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'.
-1.625 + 0.6875x + x2 = 0

Move the constant term to the right:

Add '1.625' to each side of the equation.
-1.625 + 0.6875x + 1.625 + x2 = 0 + 1.625

Reorder the terms:
-1.625 + 1.625 + 0.6875x + x2 = 0 + 1.625

Combine like terms: -1.625 + 1.625 = 0.000
0.000 + 0.6875x + x2 = 0 + 1.625
0.6875x + x2 = 0 + 1.625

Combine like terms: 0 + 1.625 = 1.625
0.6875x + x2 = 1.625

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 = 1.625 + 0.1181640625

Reorder the terms:
0.1181640625 + 0.6875x + x2 = 1.625 + 0.1181640625

Combine like terms: 1.625 + 0.1181640625 = 1.7431640625
0.1181640625 + 0.6875x + x2 = 1.7431640625

Factor a perfect square on the left side:
(x + 0.34375)(x + 0.34375) = 1.7431640625

Calculate the square root of the right side: 1.320289386

Break this problem into two subproblems by setting 
(x + 0.34375) equal to 1.320289386 and -1.320289386.

Subproblem 1

x + 0.34375 = 1.320289386 Simplifying x + 0.34375 = 1.320289386 Reorder the terms: 0.34375 + x = 1.320289386 Solving 0.34375 + x = 1.320289386 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 = 1.320289386 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + x = 1.320289386 + -0.34375 x = 1.320289386 + -0.34375 Combine like terms: 1.320289386 + -0.34375 = 0.976539386 x = 0.976539386 Simplifying x = 0.976539386

Subproblem 2

x + 0.34375 = -1.320289386 Simplifying x + 0.34375 = -1.320289386 Reorder the terms: 0.34375 + x = -1.320289386 Solving 0.34375 + x = -1.320289386 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 = -1.320289386 + -0.34375 Combine like terms: 0.34375 + -0.34375 = 0.00000 0.00000 + x = -1.320289386 + -0.34375 x = -1.320289386 + -0.34375 Combine like terms: -1.320289386 + -0.34375 = -1.664039386 x = -1.664039386 Simplifying x = -1.664039386

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.976539386, -1.664039386}

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