4.9x^2+5x-300=0

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Solution for 4.9x^2+5x-300=0 equation:


Simplifying
4.9x2 + 5x + -300 = 0

Reorder the terms:
-300 + 5x + 4.9x2 = 0

Solving
-300 + 5x + 4.9x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.9'.
-61.2244898 + 1.020408163x + x2 = 0

Move the constant term to the right:

Add '61.2244898' to each side of the equation.
-61.2244898 + 1.020408163x + 61.2244898 + x2 = 0 + 61.2244898

Reorder the terms:
-61.2244898 + 61.2244898 + 1.020408163x + x2 = 0 + 61.2244898

Combine like terms: -61.2244898 + 61.2244898 = 0.0000000
0.0000000 + 1.020408163x + x2 = 0 + 61.2244898
1.020408163x + x2 = 0 + 61.2244898

Combine like terms: 0 + 61.2244898 = 61.2244898
1.020408163x + x2 = 61.2244898

The x term is 1.020408163x.  Take half its coefficient (0.5102040815).
Square it (0.2603082048) and add it to both sides.

Add '0.2603082048' to each side of the equation.
1.020408163x + 0.2603082048 + x2 = 61.2244898 + 0.2603082048

Reorder the terms:
0.2603082048 + 1.020408163x + x2 = 61.2244898 + 0.2603082048

Combine like terms: 61.2244898 + 0.2603082048 = 61.4847980048
0.2603082048 + 1.020408163x + x2 = 61.4847980048

Factor a perfect square on the left side:
(x + 0.5102040815)(x + 0.5102040815) = 61.4847980048

Calculate the square root of the right side: 7.841224267

Break this problem into two subproblems by setting 
(x + 0.5102040815) equal to 7.841224267 and -7.841224267.

Subproblem 1

x + 0.5102040815 = 7.841224267 Simplifying x + 0.5102040815 = 7.841224267 Reorder the terms: 0.5102040815 + x = 7.841224267 Solving 0.5102040815 + x = 7.841224267 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5102040815' to each side of the equation. 0.5102040815 + -0.5102040815 + x = 7.841224267 + -0.5102040815 Combine like terms: 0.5102040815 + -0.5102040815 = 0.0000000000 0.0000000000 + x = 7.841224267 + -0.5102040815 x = 7.841224267 + -0.5102040815 Combine like terms: 7.841224267 + -0.5102040815 = 7.3310201855 x = 7.3310201855 Simplifying x = 7.3310201855

Subproblem 2

x + 0.5102040815 = -7.841224267 Simplifying x + 0.5102040815 = -7.841224267 Reorder the terms: 0.5102040815 + x = -7.841224267 Solving 0.5102040815 + x = -7.841224267 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5102040815' to each side of the equation. 0.5102040815 + -0.5102040815 + x = -7.841224267 + -0.5102040815 Combine like terms: 0.5102040815 + -0.5102040815 = 0.0000000000 0.0000000000 + x = -7.841224267 + -0.5102040815 x = -7.841224267 + -0.5102040815 Combine like terms: -7.841224267 + -0.5102040815 = -8.3514283485 x = -8.3514283485 Simplifying x = -8.3514283485

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.3310201855, -8.3514283485}

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