-16x^2+55x=26

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Solution for -16x^2+55x=26 equation:


Simplifying
-16x2 + 55x = 26

Reorder the terms:
55x + -16x2 = 26

Solving
55x + -16x2 = 26

Solving for variable 'x'.

Reorder the terms:
-26 + 55x + -16x2 = 26 + -26

Combine like terms: 26 + -26 = 0
-26 + 55x + -16x2 = 0

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

Divide each side by '-16'.
1.625 + -3.4375x + x2 = 0

Move the constant term to the right:

Add '-1.625' to each side of the equation.
1.625 + -3.4375x + -1.625 + x2 = 0 + -1.625

Reorder the terms:
1.625 + -1.625 + -3.4375x + x2 = 0 + -1.625

Combine like terms: 1.625 + -1.625 = 0.000
0.000 + -3.4375x + x2 = 0 + -1.625
-3.4375x + x2 = 0 + -1.625

Combine like terms: 0 + -1.625 = -1.625
-3.4375x + x2 = -1.625

The x term is -3.4375x.  Take half its coefficient (-1.71875).
Square it (2.954101563) and add it to both sides.

Add '2.954101563' to each side of the equation.
-3.4375x + 2.954101563 + x2 = -1.625 + 2.954101563

Reorder the terms:
2.954101563 + -3.4375x + x2 = -1.625 + 2.954101563

Combine like terms: -1.625 + 2.954101563 = 1.329101563
2.954101563 + -3.4375x + x2 = 1.329101563

Factor a perfect square on the left side:
(x + -1.71875)(x + -1.71875) = 1.329101563

Calculate the square root of the right side: 1.152866672

Break this problem into two subproblems by setting 
(x + -1.71875) equal to 1.152866672 and -1.152866672.

Subproblem 1

x + -1.71875 = 1.152866672 Simplifying x + -1.71875 = 1.152866672 Reorder the terms: -1.71875 + x = 1.152866672 Solving -1.71875 + x = 1.152866672 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.71875' to each side of the equation. -1.71875 + 1.71875 + x = 1.152866672 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + x = 1.152866672 + 1.71875 x = 1.152866672 + 1.71875 Combine like terms: 1.152866672 + 1.71875 = 2.871616672 x = 2.871616672 Simplifying x = 2.871616672

Subproblem 2

x + -1.71875 = -1.152866672 Simplifying x + -1.71875 = -1.152866672 Reorder the terms: -1.71875 + x = -1.152866672 Solving -1.71875 + x = -1.152866672 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.71875' to each side of the equation. -1.71875 + 1.71875 + x = -1.152866672 + 1.71875 Combine like terms: -1.71875 + 1.71875 = 0.00000 0.00000 + x = -1.152866672 + 1.71875 x = -1.152866672 + 1.71875 Combine like terms: -1.152866672 + 1.71875 = 0.565883328 x = 0.565883328 Simplifying x = 0.565883328

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.871616672, 0.565883328}

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