0=-0.05x^2+2.7x+5.4

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Solution for 0=-0.05x^2+2.7x+5.4 equation:


Simplifying
0 = -0.05x2 + 2.7x + 5.4

Reorder the terms:
0 = 5.4 + 2.7x + -0.05x2

Solving
0 = 5.4 + 2.7x + -0.05x2

Solving for variable 'x'.

Combine like terms: 0 + -5.4 = -5.4
-5.4 + -2.7x + 0.05x2 = 5.4 + 2.7x + -0.05x2 + -5.4 + -2.7x + 0.05x2

Reorder the terms:
-5.4 + -2.7x + 0.05x2 = 5.4 + -5.4 + 2.7x + -2.7x + -0.05x2 + 0.05x2

Combine like terms: 5.4 + -5.4 = 0.0
-5.4 + -2.7x + 0.05x2 = 0.0 + 2.7x + -2.7x + -0.05x2 + 0.05x2
-5.4 + -2.7x + 0.05x2 = 2.7x + -2.7x + -0.05x2 + 0.05x2

Combine like terms: 2.7x + -2.7x = 0.0
-5.4 + -2.7x + 0.05x2 = 0.0 + -0.05x2 + 0.05x2
-5.4 + -2.7x + 0.05x2 = -0.05x2 + 0.05x2

Combine like terms: -0.05x2 + 0.05x2 = 0.00
-5.4 + -2.7x + 0.05x2 = 0.00

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

Divide each side by '0.05'.
-108 + -54x + x2 = 0

Move the constant term to the right:

Add '108' to each side of the equation.
-108 + -54x + 108 + x2 = 0 + 108

Reorder the terms:
-108 + 108 + -54x + x2 = 0 + 108

Combine like terms: -108 + 108 = 0
0 + -54x + x2 = 0 + 108
-54x + x2 = 0 + 108

Combine like terms: 0 + 108 = 108
-54x + x2 = 108

The x term is -54x.  Take half its coefficient (-27).
Square it (729) and add it to both sides.

Add '729' to each side of the equation.
-54x + 729 + x2 = 108 + 729

Reorder the terms:
729 + -54x + x2 = 108 + 729

Combine like terms: 108 + 729 = 837
729 + -54x + x2 = 837

Factor a perfect square on the left side:
(x + -27)(x + -27) = 837

Calculate the square root of the right side: 28.930952283

Break this problem into two subproblems by setting 
(x + -27) equal to 28.930952283 and -28.930952283.

Subproblem 1

x + -27 = 28.930952283 Simplifying x + -27 = 28.930952283 Reorder the terms: -27 + x = 28.930952283 Solving -27 + x = 28.930952283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + x = 28.930952283 + 27 Combine like terms: -27 + 27 = 0 0 + x = 28.930952283 + 27 x = 28.930952283 + 27 Combine like terms: 28.930952283 + 27 = 55.930952283 x = 55.930952283 Simplifying x = 55.930952283

Subproblem 2

x + -27 = -28.930952283 Simplifying x + -27 = -28.930952283 Reorder the terms: -27 + x = -28.930952283 Solving -27 + x = -28.930952283 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '27' to each side of the equation. -27 + 27 + x = -28.930952283 + 27 Combine like terms: -27 + 27 = 0 0 + x = -28.930952283 + 27 x = -28.930952283 + 27 Combine like terms: -28.930952283 + 27 = -1.930952283 x = -1.930952283 Simplifying x = -1.930952283

Solution

The solution to the problem is based on the solutions from the subproblems. x = {55.930952283, -1.930952283}

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