0=-4.9X^2+16.6X+58.8

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Solution for 0=-4.9X^2+16.6X+58.8 equation:


Simplifying
0 = -4.9X2 + 16.6X + 58.8

Reorder the terms:
0 = 58.8 + 16.6X + -4.9X2

Solving
0 = 58.8 + 16.6X + -4.9X2

Solving for variable 'X'.

Combine like terms: 0 + -58.8 = -58.8
-58.8 + -16.6X + 4.9X2 = 58.8 + 16.6X + -4.9X2 + -58.8 + -16.6X + 4.9X2

Reorder the terms:
-58.8 + -16.6X + 4.9X2 = 58.8 + -58.8 + 16.6X + -16.6X + -4.9X2 + 4.9X2

Combine like terms: 58.8 + -58.8 = 0.0
-58.8 + -16.6X + 4.9X2 = 0.0 + 16.6X + -16.6X + -4.9X2 + 4.9X2
-58.8 + -16.6X + 4.9X2 = 16.6X + -16.6X + -4.9X2 + 4.9X2

Combine like terms: 16.6X + -16.6X = 0.0
-58.8 + -16.6X + 4.9X2 = 0.0 + -4.9X2 + 4.9X2
-58.8 + -16.6X + 4.9X2 = -4.9X2 + 4.9X2

Combine like terms: -4.9X2 + 4.9X2 = 0.0
-58.8 + -16.6X + 4.9X2 = 0.0

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

Divide each side by '4.9'.
-12 + -3.387755102X + X2 = 0

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + -3.387755102X + 12 + X2 = 0 + 12

Reorder the terms:
-12 + 12 + -3.387755102X + X2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -3.387755102X + X2 = 0 + 12
-3.387755102X + X2 = 0 + 12

Combine like terms: 0 + 12 = 12
-3.387755102X + X2 = 12

The X term is -3.387755102X.  Take half its coefficient (-1.693877551).
Square it (2.869221158) and add it to both sides.

Add '2.869221158' to each side of the equation.
-3.387755102X + 2.869221158 + X2 = 12 + 2.869221158

Reorder the terms:
2.869221158 + -3.387755102X + X2 = 12 + 2.869221158

Combine like terms: 12 + 2.869221158 = 14.869221158
2.869221158 + -3.387755102X + X2 = 14.869221158

Factor a perfect square on the left side:
(X + -1.693877551)(X + -1.693877551) = 14.869221158

Calculate the square root of the right side: 3.856062909

Break this problem into two subproblems by setting 
(X + -1.693877551) equal to 3.856062909 and -3.856062909.

Subproblem 1

X + -1.693877551 = 3.856062909 Simplifying X + -1.693877551 = 3.856062909 Reorder the terms: -1.693877551 + X = 3.856062909 Solving -1.693877551 + X = 3.856062909 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.693877551' to each side of the equation. -1.693877551 + 1.693877551 + X = 3.856062909 + 1.693877551 Combine like terms: -1.693877551 + 1.693877551 = 0.000000000 0.000000000 + X = 3.856062909 + 1.693877551 X = 3.856062909 + 1.693877551 Combine like terms: 3.856062909 + 1.693877551 = 5.54994046 X = 5.54994046 Simplifying X = 5.54994046

Subproblem 2

X + -1.693877551 = -3.856062909 Simplifying X + -1.693877551 = -3.856062909 Reorder the terms: -1.693877551 + X = -3.856062909 Solving -1.693877551 + X = -3.856062909 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '1.693877551' to each side of the equation. -1.693877551 + 1.693877551 + X = -3.856062909 + 1.693877551 Combine like terms: -1.693877551 + 1.693877551 = 0.000000000 0.000000000 + X = -3.856062909 + 1.693877551 X = -3.856062909 + 1.693877551 Combine like terms: -3.856062909 + 1.693877551 = -2.162185358 X = -2.162185358 Simplifying X = -2.162185358

Solution

The solution to the problem is based on the solutions from the subproblems. X = {5.54994046, -2.162185358}

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