80.436=-0.014x^2+1.253x+60.976

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Solution for 80.436=-0.014x^2+1.253x+60.976 equation:


Simplifying
80.436 = -0.014x2 + 1.253x + 60.976

Reorder the terms:
80.436 = 60.976 + 1.253x + -0.014x2

Solving
80.436 = 60.976 + 1.253x + -0.014x2

Solving for variable 'x'.

Combine like terms: 80.436 + -60.976 = 19.46
19.46 + -1.253x + 0.014x2 = 60.976 + 1.253x + -0.014x2 + -60.976 + -1.253x + 0.014x2

Reorder the terms:
19.46 + -1.253x + 0.014x2 = 60.976 + -60.976 + 1.253x + -1.253x + -0.014x2 + 0.014x2

Combine like terms: 60.976 + -60.976 = 0.000
19.46 + -1.253x + 0.014x2 = 0.000 + 1.253x + -1.253x + -0.014x2 + 0.014x2
19.46 + -1.253x + 0.014x2 = 1.253x + -1.253x + -0.014x2 + 0.014x2

Combine like terms: 1.253x + -1.253x = 0.000
19.46 + -1.253x + 0.014x2 = 0.000 + -0.014x2 + 0.014x2
19.46 + -1.253x + 0.014x2 = -0.014x2 + 0.014x2

Combine like terms: -0.014x2 + 0.014x2 = 0.000
19.46 + -1.253x + 0.014x2 = 0.000

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

Divide each side by '0.014'.
1390 + -89.5x + x2 = 0

Move the constant term to the right:

Add '-1390' to each side of the equation.
1390 + -89.5x + -1390 + x2 = 0 + -1390

Reorder the terms:
1390 + -1390 + -89.5x + x2 = 0 + -1390

Combine like terms: 1390 + -1390 = 0
0 + -89.5x + x2 = 0 + -1390
-89.5x + x2 = 0 + -1390

Combine like terms: 0 + -1390 = -1390
-89.5x + x2 = -1390

The x term is -89.5x.  Take half its coefficient (-44.75).
Square it (2002.5625) and add it to both sides.

Add '2002.5625' to each side of the equation.
-89.5x + 2002.5625 + x2 = -1390 + 2002.5625

Reorder the terms:
2002.5625 + -89.5x + x2 = -1390 + 2002.5625

Combine like terms: -1390 + 2002.5625 = 612.5625
2002.5625 + -89.5x + x2 = 612.5625

Factor a perfect square on the left side:
(x + -44.75)(x + -44.75) = 612.5625

Calculate the square root of the right side: 24.75

Break this problem into two subproblems by setting 
(x + -44.75) equal to 24.75 and -24.75.

Subproblem 1

x + -44.75 = 24.75 Simplifying x + -44.75 = 24.75 Reorder the terms: -44.75 + x = 24.75 Solving -44.75 + x = 24.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '44.75' to each side of the equation. -44.75 + 44.75 + x = 24.75 + 44.75 Combine like terms: -44.75 + 44.75 = 0.00 0.00 + x = 24.75 + 44.75 x = 24.75 + 44.75 Combine like terms: 24.75 + 44.75 = 69.5 x = 69.5 Simplifying x = 69.5

Subproblem 2

x + -44.75 = -24.75 Simplifying x + -44.75 = -24.75 Reorder the terms: -44.75 + x = -24.75 Solving -44.75 + x = -24.75 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '44.75' to each side of the equation. -44.75 + 44.75 + x = -24.75 + 44.75 Combine like terms: -44.75 + 44.75 = 0.00 0.00 + x = -24.75 + 44.75 x = -24.75 + 44.75 Combine like terms: -24.75 + 44.75 = 20 x = 20 Simplifying x = 20

Solution

The solution to the problem is based on the solutions from the subproblems. x = {69.5, 20}

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