16x^2-11x-25=0

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Solution for 16x^2-11x-25=0 equation:


Simplifying
16x2 + -11x + -25 = 0

Reorder the terms:
-25 + -11x + 16x2 = 0

Solving
-25 + -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'.
-1.5625 + -0.6875x + x2 = 0

Move the constant term to the right:

Add '1.5625' to each side of the equation.
-1.5625 + -0.6875x + 1.5625 + x2 = 0 + 1.5625

Reorder the terms:
-1.5625 + 1.5625 + -0.6875x + x2 = 0 + 1.5625

Combine like terms: -1.5625 + 1.5625 = 0.0000
0.0000 + -0.6875x + x2 = 0 + 1.5625
-0.6875x + x2 = 0 + 1.5625

Combine like terms: 0 + 1.5625 = 1.5625
-0.6875x + x2 = 1.5625

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 = 1.5625 + 0.1181640625

Reorder the terms:
0.1181640625 + -0.6875x + x2 = 1.5625 + 0.1181640625

Combine like terms: 1.5625 + 0.1181640625 = 1.6806640625
0.1181640625 + -0.6875x + x2 = 1.6806640625

Factor a perfect square on the left side:
(x + -0.34375)(x + -0.34375) = 1.6806640625

Calculate the square root of the right side: 1.296404282

Break this problem into two subproblems by setting 
(x + -0.34375) equal to 1.296404282 and -1.296404282.

Subproblem 1

x + -0.34375 = 1.296404282 Simplifying x + -0.34375 = 1.296404282 Reorder the terms: -0.34375 + x = 1.296404282 Solving -0.34375 + x = 1.296404282 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 = 1.296404282 + 0.34375 Combine like terms: -0.34375 + 0.34375 = 0.00000 0.00000 + x = 1.296404282 + 0.34375 x = 1.296404282 + 0.34375 Combine like terms: 1.296404282 + 0.34375 = 1.640154282 x = 1.640154282 Simplifying x = 1.640154282

Subproblem 2

x + -0.34375 = -1.296404282 Simplifying x + -0.34375 = -1.296404282 Reorder the terms: -0.34375 + x = -1.296404282 Solving -0.34375 + x = -1.296404282 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 = -1.296404282 + 0.34375 Combine like terms: -0.34375 + 0.34375 = 0.00000 0.00000 + x = -1.296404282 + 0.34375 x = -1.296404282 + 0.34375 Combine like terms: -1.296404282 + 0.34375 = -0.952654282 x = -0.952654282 Simplifying x = -0.952654282

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.640154282, -0.952654282}

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