0.02x^2-2.6x+66.5=0

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Solution for 0.02x^2-2.6x+66.5=0 equation:


Simplifying
0.02x2 + -2.6x + 66.5 = 0

Reorder the terms:
66.5 + -2.6x + 0.02x2 = 0

Solving
66.5 + -2.6x + 0.02x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.02'.
3325 + -130x + x2 = 0

Move the constant term to the right:

Add '-3325' to each side of the equation.
3325 + -130x + -3325 + x2 = 0 + -3325

Reorder the terms:
3325 + -3325 + -130x + x2 = 0 + -3325

Combine like terms: 3325 + -3325 = 0
0 + -130x + x2 = 0 + -3325
-130x + x2 = 0 + -3325

Combine like terms: 0 + -3325 = -3325
-130x + x2 = -3325

The x term is -130x.  Take half its coefficient (-65).
Square it (4225) and add it to both sides.

Add '4225' to each side of the equation.
-130x + 4225 + x2 = -3325 + 4225

Reorder the terms:
4225 + -130x + x2 = -3325 + 4225

Combine like terms: -3325 + 4225 = 900
4225 + -130x + x2 = 900

Factor a perfect square on the left side:
(x + -65)(x + -65) = 900

Calculate the square root of the right side: 30

Break this problem into two subproblems by setting 
(x + -65) equal to 30 and -30.

Subproblem 1

x + -65 = 30 Simplifying x + -65 = 30 Reorder the terms: -65 + x = 30 Solving -65 + x = 30 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '65' to each side of the equation. -65 + 65 + x = 30 + 65 Combine like terms: -65 + 65 = 0 0 + x = 30 + 65 x = 30 + 65 Combine like terms: 30 + 65 = 95 x = 95 Simplifying x = 95

Subproblem 2

x + -65 = -30 Simplifying x + -65 = -30 Reorder the terms: -65 + x = -30 Solving -65 + x = -30 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '65' to each side of the equation. -65 + 65 + x = -30 + 65 Combine like terms: -65 + 65 = 0 0 + x = -30 + 65 x = -30 + 65 Combine like terms: -30 + 65 = 35 x = 35 Simplifying x = 35

Solution

The solution to the problem is based on the solutions from the subproblems. x = {95, 35}

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