80000000000=-.27x^2+3.3x+77

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Solution for 80000000000=-.27x^2+3.3x+77 equation: 


Simplifying
80000000000 = -0.27x2 + 3.3x + 77

Reorder the terms:
80000000000 = 77 + 3.3x + -0.27x2

Solving
80000000000 = 77 + 3.3x + -0.27x2

Solving for variable 'x'.

Combine like terms: 80000000000 + -77 = 79999999923
79999999923 + -3.3x + 0.27x2 = 77 + 3.3x + -0.27x2 + -77 + -3.3x + 0.27x2

Reorder the terms:
79999999923 + -3.3x + 0.27x2 = 77 + -77 + 3.3x + -3.3x + -0.27x2 + 0.27x2

Combine like terms: 77 + -77 = 0
79999999923 + -3.3x + 0.27x2 = 0 + 3.3x + -3.3x + -0.27x2 + 0.27x2
79999999923 + -3.3x + 0.27x2 = 3.3x + -3.3x + -0.27x2 + 0.27x2

Combine like terms: 3.3x + -3.3x = 0.0
79999999923 + -3.3x + 0.27x2 = 0.0 + -0.27x2 + 0.27x2
79999999923 + -3.3x + 0.27x2 = -0.27x2 + 0.27x2

Combine like terms: -0.27x2 + 0.27x2 = 0.00
79999999923 + -3.3x + 0.27x2 = 0.00

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

Divide each side by '0.27'.
296296296000 + -12.22222222x + x2 = 0

Move the constant term to the right:

Add '-296296296000' to each side of the equation.
296296296000 + -12.22222222x + -296296296000 + x2 = 0 + -296296296000

Reorder the terms:
296296296000 + -296296296000 + -12.22222222x + x2 = 0 + -296296296000

Combine like terms: 296296296000 + -296296296000 = 0
0 + -12.22222222x + x2 = 0 + -296296296000
-12.22222222x + x2 = 0 + -296296296000

Combine like terms: 0 + -296296296000 = -296296296000
-12.22222222x + x2 = -296296296000

The x term is -12.22222222x.  Take half its coefficient (-6.11111111).
Square it (37.34567900) and add it to both sides.

Add '37.34567900' to each side of the equation.
-12.22222222x + 37.34567900 + x2 = -296296296000 + 37.34567900

Reorder the terms:
37.34567900 + -12.22222222x + x2 = -296296296000 + 37.34567900

Combine like terms: -296296296000 + 37.34567900 = -296296295962.654321
37.34567900 + -12.22222222x + x2 = -296296295962.654321

Factor a perfect square on the left side:
(x + -6.11111111)(x + -6.11111111) = -296296295962.654321

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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