4.9x^2+-5x-218=0

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Solution for 4.9x^2+-5x-218=0 equation:


Simplifying
4.9x2 + -5x + -218 = 0

Reorder the terms:
-218 + -5x + 4.9x2 = 0

Solving
-218 + -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'.
-44.48979592 + -1.020408163x + x2 = 0

Move the constant term to the right:

Add '44.48979592' to each side of the equation.
-44.48979592 + -1.020408163x + 44.48979592 + x2 = 0 + 44.48979592

Reorder the terms:
-44.48979592 + 44.48979592 + -1.020408163x + x2 = 0 + 44.48979592

Combine like terms: -44.48979592 + 44.48979592 = 0.00000000
0.00000000 + -1.020408163x + x2 = 0 + 44.48979592
-1.020408163x + x2 = 0 + 44.48979592

Combine like terms: 0 + 44.48979592 = 44.48979592
-1.020408163x + x2 = 44.48979592

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 = 44.48979592 + 0.2603082048

Reorder the terms:
0.2603082048 + -1.020408163x + x2 = 44.48979592 + 0.2603082048

Combine like terms: 44.48979592 + 0.2603082048 = 44.7501041248
0.2603082048 + -1.020408163x + x2 = 44.7501041248

Factor a perfect square on the left side:
(x + -0.5102040815)(x + -0.5102040815) = 44.7501041248

Calculate the square root of the right side: 6.689551863

Break this problem into two subproblems by setting 
(x + -0.5102040815) equal to 6.689551863 and -6.689551863.

Subproblem 1

x + -0.5102040815 = 6.689551863 Simplifying x + -0.5102040815 = 6.689551863 Reorder the terms: -0.5102040815 + x = 6.689551863 Solving -0.5102040815 + x = 6.689551863 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 = 6.689551863 + 0.5102040815 Combine like terms: -0.5102040815 + 0.5102040815 = 0.0000000000 0.0000000000 + x = 6.689551863 + 0.5102040815 x = 6.689551863 + 0.5102040815 Combine like terms: 6.689551863 + 0.5102040815 = 7.1997559445 x = 7.1997559445 Simplifying x = 7.1997559445

Subproblem 2

x + -0.5102040815 = -6.689551863 Simplifying x + -0.5102040815 = -6.689551863 Reorder the terms: -0.5102040815 + x = -6.689551863 Solving -0.5102040815 + x = -6.689551863 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 = -6.689551863 + 0.5102040815 Combine like terms: -0.5102040815 + 0.5102040815 = 0.0000000000 0.0000000000 + x = -6.689551863 + 0.5102040815 x = -6.689551863 + 0.5102040815 Combine like terms: -6.689551863 + 0.5102040815 = -6.1793477815 x = -6.1793477815 Simplifying x = -6.1793477815

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.1997559445, -6.1793477815}

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