9.2=-.01x^2+.24x+8.76

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Solution for 9.2=-.01x^2+.24x+8.76 equation:


Simplifying
9.2 = -0.01x2 + 0.24x + 8.76

Reorder the terms:
9.2 = 8.76 + 0.24x + -0.01x2

Solving
9.2 = 8.76 + 0.24x + -0.01x2

Solving for variable 'x'.

Combine like terms: 9.2 + -8.76 = 0.44
0.44 + -0.24x + 0.01x2 = 8.76 + 0.24x + -0.01x2 + -8.76 + -0.24x + 0.01x2

Reorder the terms:
0.44 + -0.24x + 0.01x2 = 8.76 + -8.76 + 0.24x + -0.24x + -0.01x2 + 0.01x2

Combine like terms: 8.76 + -8.76 = 0.00
0.44 + -0.24x + 0.01x2 = 0.00 + 0.24x + -0.24x + -0.01x2 + 0.01x2
0.44 + -0.24x + 0.01x2 = 0.24x + -0.24x + -0.01x2 + 0.01x2

Combine like terms: 0.24x + -0.24x = 0.00
0.44 + -0.24x + 0.01x2 = 0.00 + -0.01x2 + 0.01x2
0.44 + -0.24x + 0.01x2 = -0.01x2 + 0.01x2

Combine like terms: -0.01x2 + 0.01x2 = 0.00
0.44 + -0.24x + 0.01x2 = 0.00

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

Divide each side by '0.01'.
44 + -24x + x2 = 0

Move the constant term to the right:

Add '-44' to each side of the equation.
44 + -24x + -44 + x2 = 0 + -44

Reorder the terms:
44 + -44 + -24x + x2 = 0 + -44

Combine like terms: 44 + -44 = 0
0 + -24x + x2 = 0 + -44
-24x + x2 = 0 + -44

Combine like terms: 0 + -44 = -44
-24x + x2 = -44

The x term is -24x.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24x + 144 + x2 = -44 + 144

Reorder the terms:
144 + -24x + x2 = -44 + 144

Combine like terms: -44 + 144 = 100
144 + -24x + x2 = 100

Factor a perfect square on the left side:
(x + -12)(x + -12) = 100

Calculate the square root of the right side: 10

Break this problem into two subproblems by setting 
(x + -12) equal to 10 and -10.

Subproblem 1

x + -12 = 10 Simplifying x + -12 = 10 Reorder the terms: -12 + x = 10 Solving -12 + x = 10 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = 10 + 12 Combine like terms: -12 + 12 = 0 0 + x = 10 + 12 x = 10 + 12 Combine like terms: 10 + 12 = 22 x = 22 Simplifying x = 22

Subproblem 2

x + -12 = -10 Simplifying x + -12 = -10 Reorder the terms: -12 + x = -10 Solving -12 + x = -10 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = -10 + 12 Combine like terms: -12 + 12 = 0 0 + x = -10 + 12 x = -10 + 12 Combine like terms: -10 + 12 = 2 x = 2 Simplifying x = 2

Solution

The solution to the problem is based on the solutions from the subproblems. x = {22, 2}

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