0=-4.9x^2+107.8x+200

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Solution for 0=-4.9x^2+107.8x+200 equation:


Simplifying
0 = -4.9x2 + 107.8x + 200

Reorder the terms:
0 = 200 + 107.8x + -4.9x2

Solving
0 = 200 + 107.8x + -4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -200 = -200
-200 + -107.8x + 4.9x2 = 200 + 107.8x + -4.9x2 + -200 + -107.8x + 4.9x2

Reorder the terms:
-200 + -107.8x + 4.9x2 = 200 + -200 + 107.8x + -107.8x + -4.9x2 + 4.9x2

Combine like terms: 200 + -200 = 0
-200 + -107.8x + 4.9x2 = 0 + 107.8x + -107.8x + -4.9x2 + 4.9x2
-200 + -107.8x + 4.9x2 = 107.8x + -107.8x + -4.9x2 + 4.9x2

Combine like terms: 107.8x + -107.8x = 0.0
-200 + -107.8x + 4.9x2 = 0.0 + -4.9x2 + 4.9x2
-200 + -107.8x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-200 + -107.8x + 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'.
-40.81632653 + -22x + x2 = 0

Move the constant term to the right:

Add '40.81632653' to each side of the equation.
-40.81632653 + -22x + 40.81632653 + x2 = 0 + 40.81632653

Reorder the terms:
-40.81632653 + 40.81632653 + -22x + x2 = 0 + 40.81632653

Combine like terms: -40.81632653 + 40.81632653 = 0.00000000
0.00000000 + -22x + x2 = 0 + 40.81632653
-22x + x2 = 0 + 40.81632653

Combine like terms: 0 + 40.81632653 = 40.81632653
-22x + x2 = 40.81632653

The x term is -22x.  Take half its coefficient (-11).
Square it (121) and add it to both sides.

Add '121' to each side of the equation.
-22x + 121 + x2 = 40.81632653 + 121

Reorder the terms:
121 + -22x + x2 = 40.81632653 + 121

Combine like terms: 40.81632653 + 121 = 161.81632653
121 + -22x + x2 = 161.81632653

Factor a perfect square on the left side:
(x + -11)(x + -11) = 161.81632653

Calculate the square root of the right side: 12.72070464

Break this problem into two subproblems by setting 
(x + -11) equal to 12.72070464 and -12.72070464.

Subproblem 1

x + -11 = 12.72070464 Simplifying x + -11 = 12.72070464 Reorder the terms: -11 + x = 12.72070464 Solving -11 + x = 12.72070464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 12.72070464 + 11 Combine like terms: -11 + 11 = 0 0 + x = 12.72070464 + 11 x = 12.72070464 + 11 Combine like terms: 12.72070464 + 11 = 23.72070464 x = 23.72070464 Simplifying x = 23.72070464

Subproblem 2

x + -11 = -12.72070464 Simplifying x + -11 = -12.72070464 Reorder the terms: -11 + x = -12.72070464 Solving -11 + x = -12.72070464 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = -12.72070464 + 11 Combine like terms: -11 + 11 = 0 0 + x = -12.72070464 + 11 x = -12.72070464 + 11 Combine like terms: -12.72070464 + 11 = -1.72070464 x = -1.72070464 Simplifying x = -1.72070464

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.72070464, -1.72070464}

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