74.016=1117.72x+21.338x^2

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Solution for 74.016=1117.72x+21.338x^2 equation:


Simplifying
74.016 = 1117.72x + 21.338x2

Solving
74.016 = 1117.72x + 21.338x2

Solving for variable 'x'.

Reorder the terms:
74.016 + -1117.72x + -21.338x2 = 1117.72x + -1117.72x + 21.338x2 + -21.338x2

Combine like terms: 1117.72x + -1117.72x = 0.00
74.016 + -1117.72x + -21.338x2 = 0.00 + 21.338x2 + -21.338x2
74.016 + -1117.72x + -21.338x2 = 21.338x2 + -21.338x2

Combine like terms: 21.338x2 + -21.338x2 = 0.000
74.016 + -1117.72x + -21.338x2 = 0.000

Begin completing the square.  Divide all terms by
-21.338 the coefficient of the squared term: 

Divide each side by '-21.338'.
-3.468741213 + 52.38166651x + x2 = 0

Move the constant term to the right:

Add '3.468741213' to each side of the equation.
-3.468741213 + 52.38166651x + 3.468741213 + x2 = 0 + 3.468741213

Reorder the terms:
-3.468741213 + 3.468741213 + 52.38166651x + x2 = 0 + 3.468741213

Combine like terms: -3.468741213 + 3.468741213 = 0.000000000
0.000000000 + 52.38166651x + x2 = 0 + 3.468741213
52.38166651x + x2 = 0 + 3.468741213

Combine like terms: 0 + 3.468741213 = 3.468741213
52.38166651x + x2 = 3.468741213

The x term is 52.38166651x.  Take half its coefficient (26.19083326).
Square it (685.9597469) and add it to both sides.

Add '685.9597469' to each side of the equation.
52.38166651x + 685.9597469 + x2 = 3.468741213 + 685.9597469

Reorder the terms:
685.9597469 + 52.38166651x + x2 = 3.468741213 + 685.9597469

Combine like terms: 3.468741213 + 685.9597469 = 689.428488113
685.9597469 + 52.38166651x + x2 = 689.428488113

Factor a perfect square on the left side:
(x + 26.19083326)(x + 26.19083326) = 689.428488113

Calculate the square root of the right side: 26.256970277

Break this problem into two subproblems by setting 
(x + 26.19083326) equal to 26.256970277 and -26.256970277.

Subproblem 1

x + 26.19083326 = 26.256970277 Simplifying x + 26.19083326 = 26.256970277 Reorder the terms: 26.19083326 + x = 26.256970277 Solving 26.19083326 + x = 26.256970277 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-26.19083326' to each side of the equation. 26.19083326 + -26.19083326 + x = 26.256970277 + -26.19083326 Combine like terms: 26.19083326 + -26.19083326 = 0.00000000 0.00000000 + x = 26.256970277 + -26.19083326 x = 26.256970277 + -26.19083326 Combine like terms: 26.256970277 + -26.19083326 = 0.066137017 x = 0.066137017 Simplifying x = 0.066137017

Subproblem 2

x + 26.19083326 = -26.256970277 Simplifying x + 26.19083326 = -26.256970277 Reorder the terms: 26.19083326 + x = -26.256970277 Solving 26.19083326 + x = -26.256970277 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-26.19083326' to each side of the equation. 26.19083326 + -26.19083326 + x = -26.256970277 + -26.19083326 Combine like terms: 26.19083326 + -26.19083326 = 0.00000000 0.00000000 + x = -26.256970277 + -26.19083326 x = -26.256970277 + -26.19083326 Combine like terms: -26.256970277 + -26.19083326 = -52.447803537 x = -52.447803537 Simplifying x = -52.447803537

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.066137017, -52.447803537}

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