0=2+24.5x-4.9x^2

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Solution for 0=2+24.5x-4.9x^2 equation:


Simplifying
0 = 2 + 24.5x + -4.9x2

Solving
0 = 2 + 24.5x + -4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -2 = -2
-2 + -24.5x + 4.9x2 = 2 + 24.5x + -4.9x2 + -2 + -24.5x + 4.9x2

Reorder the terms:
-2 + -24.5x + 4.9x2 = 2 + -2 + 24.5x + -24.5x + -4.9x2 + 4.9x2

Combine like terms: 2 + -2 = 0
-2 + -24.5x + 4.9x2 = 0 + 24.5x + -24.5x + -4.9x2 + 4.9x2
-2 + -24.5x + 4.9x2 = 24.5x + -24.5x + -4.9x2 + 4.9x2

Combine like terms: 24.5x + -24.5x = 0.0
-2 + -24.5x + 4.9x2 = 0.0 + -4.9x2 + 4.9x2
-2 + -24.5x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-2 + -24.5x + 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'.
-0.4081632653 + -5x + x2 = 0

Move the constant term to the right:

Add '0.4081632653' to each side of the equation.
-0.4081632653 + -5x + 0.4081632653 + x2 = 0 + 0.4081632653

Reorder the terms:
-0.4081632653 + 0.4081632653 + -5x + x2 = 0 + 0.4081632653

Combine like terms: -0.4081632653 + 0.4081632653 = 0.0000000000
0.0000000000 + -5x + x2 = 0 + 0.4081632653
-5x + x2 = 0 + 0.4081632653

Combine like terms: 0 + 0.4081632653 = 0.4081632653
-5x + x2 = 0.4081632653

The x term is -5x.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5x + 6.25 + x2 = 0.4081632653 + 6.25

Reorder the terms:
6.25 + -5x + x2 = 0.4081632653 + 6.25

Combine like terms: 0.4081632653 + 6.25 = 6.6581632653
6.25 + -5x + x2 = 6.6581632653

Factor a perfect square on the left side:
(x + -2.5)(x + -2.5) = 6.6581632653

Calculate the square root of the right side: 2.580341695

Break this problem into two subproblems by setting 
(x + -2.5) equal to 2.580341695 and -2.580341695.

Subproblem 1

x + -2.5 = 2.580341695 Simplifying x + -2.5 = 2.580341695 Reorder the terms: -2.5 + x = 2.580341695 Solving -2.5 + x = 2.580341695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 2.580341695 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.580341695 + 2.5 x = 2.580341695 + 2.5 Combine like terms: 2.580341695 + 2.5 = 5.080341695 x = 5.080341695 Simplifying x = 5.080341695

Subproblem 2

x + -2.5 = -2.580341695 Simplifying x + -2.5 = -2.580341695 Reorder the terms: -2.5 + x = -2.580341695 Solving -2.5 + x = -2.580341695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -2.580341695 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.580341695 + 2.5 x = -2.580341695 + 2.5 Combine like terms: -2.580341695 + 2.5 = -0.080341695 x = -0.080341695 Simplifying x = -0.080341695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.080341695, -0.080341695}

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