-0.01x^2+0.26x+7.60=9.2

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Solution for -0.01x^2+0.26x+7.60=9.2 equation:


Simplifying
-0.01x2 + 0.26x + 7.60 = 9.2

Reorder the terms:
7.60 + 0.26x + -0.01x2 = 9.2

Solving
7.60 + 0.26x + -0.01x2 = 9.2

Solving for variable 'x'.

Reorder the terms:
7.60 + -9.2 + 0.26x + -0.01x2 = 9.2 + -9.2

Combine like terms: 7.60 + -9.2 = -1.6
-1.6 + 0.26x + -0.01x2 = 9.2 + -9.2

Combine like terms: 9.2 + -9.2 = 0.0
-1.6 + 0.26x + -0.01x2 = 0.0

Begin completing the square.  Divide all terms by
-0.01 the coefficient of the squared term: 

Divide each side by '-0.01'.
160 + -26x + x2 = 0

Move the constant term to the right:

Add '-160' to each side of the equation.
160 + -26x + -160 + x2 = 0 + -160

Reorder the terms:
160 + -160 + -26x + x2 = 0 + -160

Combine like terms: 160 + -160 = 0
0 + -26x + x2 = 0 + -160
-26x + x2 = 0 + -160

Combine like terms: 0 + -160 = -160
-26x + x2 = -160

The x term is -26x.  Take half its coefficient (-13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
-26x + 169 + x2 = -160 + 169

Reorder the terms:
169 + -26x + x2 = -160 + 169

Combine like terms: -160 + 169 = 9
169 + -26x + x2 = 9

Factor a perfect square on the left side:
(x + -13)(x + -13) = 9

Calculate the square root of the right side: 3

Break this problem into two subproblems by setting 
(x + -13) equal to 3 and -3.

Subproblem 1

x + -13 = 3 Simplifying x + -13 = 3 Reorder the terms: -13 + x = 3 Solving -13 + x = 3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = 3 + 13 Combine like terms: -13 + 13 = 0 0 + x = 3 + 13 x = 3 + 13 Combine like terms: 3 + 13 = 16 x = 16 Simplifying x = 16

Subproblem 2

x + -13 = -3 Simplifying x + -13 = -3 Reorder the terms: -13 + x = -3 Solving -13 + x = -3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '13' to each side of the equation. -13 + 13 + x = -3 + 13 Combine like terms: -13 + 13 = 0 0 + x = -3 + 13 x = -3 + 13 Combine like terms: -3 + 13 = 10 x = 10 Simplifying x = 10

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16, 10}

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