0.05x^2+1.1x-65=0

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Solution for 0.05x^2+1.1x-65=0 equation:


Simplifying
0.05x2 + 1.1x + -65 = 0

Reorder the terms:
-65 + 1.1x + 0.05x2 = 0

Solving
-65 + 1.1x + 0.05x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.05'.
-1300 + 22x + x2 = 0

Move the constant term to the right:

Add '1300' to each side of the equation.
-1300 + 22x + 1300 + x2 = 0 + 1300

Reorder the terms:
-1300 + 1300 + 22x + x2 = 0 + 1300

Combine like terms: -1300 + 1300 = 0
0 + 22x + x2 = 0 + 1300
22x + x2 = 0 + 1300

Combine like terms: 0 + 1300 = 1300
22x + x2 = 1300

The x term is 22x.  Take half its coefficient (11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
22x + 121 + x2 = 1300 + 121

Reorder the terms:
121 + 22x + x2 = 1300 + 121

Combine like terms: 1300 + 121 = 1421
121 + 22x + x2 = 1421

Factor a perfect square on the left side:
(x + 11)(x + 11) = 1421

Calculate the square root of the right side: 37.69615365

Break this problem into two subproblems by setting 
(x + 11) equal to 37.69615365 and -37.69615365.

Subproblem 1

x + 11 = 37.69615365 Simplifying x + 11 = 37.69615365 Reorder the terms: 11 + x = 37.69615365 Solving 11 + x = 37.69615365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = 37.69615365 + -11 Combine like terms: 11 + -11 = 0 0 + x = 37.69615365 + -11 x = 37.69615365 + -11 Combine like terms: 37.69615365 + -11 = 26.69615365 x = 26.69615365 Simplifying x = 26.69615365

Subproblem 2

x + 11 = -37.69615365 Simplifying x + 11 = -37.69615365 Reorder the terms: 11 + x = -37.69615365 Solving 11 + x = -37.69615365 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11' to each side of the equation. 11 + -11 + x = -37.69615365 + -11 Combine like terms: 11 + -11 = 0 0 + x = -37.69615365 + -11 x = -37.69615365 + -11 Combine like terms: -37.69615365 + -11 = -48.69615365 x = -48.69615365 Simplifying x = -48.69615365

Solution

The solution to the problem is based on the solutions from the subproblems. x = {26.69615365, -48.69615365}

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