4.905x^2-53x+126=0

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Solution for 4.905x^2-53x+126=0 equation:


Simplifying
4.905x2 + -53x + 126 = 0

Reorder the terms:
126 + -53x + 4.905x2 = 0

Solving
126 + -53x + 4.905x2 = 0

Solving for variable 'x'.

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

Divide each side by '4.905'.
25.68807339 + -10.80530071x + x2 = 0

Move the constant term to the right:

Add '-25.68807339' to each side of the equation.
25.68807339 + -10.80530071x + -25.68807339 + x2 = 0 + -25.68807339

Reorder the terms:
25.68807339 + -25.68807339 + -10.80530071x + x2 = 0 + -25.68807339

Combine like terms: 25.68807339 + -25.68807339 = 0.00000000
0.00000000 + -10.80530071x + x2 = 0 + -25.68807339
-10.80530071x + x2 = 0 + -25.68807339

Combine like terms: 0 + -25.68807339 = -25.68807339
-10.80530071x + x2 = -25.68807339

The x term is -10.80530071x.  Take half its coefficient (-5.402650355).
Square it (29.18863086) and add it to both sides.

Add '29.18863086' to each side of the equation.
-10.80530071x + 29.18863086 + x2 = -25.68807339 + 29.18863086

Reorder the terms:
29.18863086 + -10.80530071x + x2 = -25.68807339 + 29.18863086

Combine like terms: -25.68807339 + 29.18863086 = 3.50055747
29.18863086 + -10.80530071x + x2 = 3.50055747

Factor a perfect square on the left side:
(x + -5.402650355)(x + -5.402650355) = 3.50055747

Calculate the square root of the right side: 1.870977678

Break this problem into two subproblems by setting 
(x + -5.402650355) equal to 1.870977678 and -1.870977678.

Subproblem 1

x + -5.402650355 = 1.870977678 Simplifying x + -5.402650355 = 1.870977678 Reorder the terms: -5.402650355 + x = 1.870977678 Solving -5.402650355 + x = 1.870977678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.402650355' to each side of the equation. -5.402650355 + 5.402650355 + x = 1.870977678 + 5.402650355 Combine like terms: -5.402650355 + 5.402650355 = 0.000000000 0.000000000 + x = 1.870977678 + 5.402650355 x = 1.870977678 + 5.402650355 Combine like terms: 1.870977678 + 5.402650355 = 7.273628033 x = 7.273628033 Simplifying x = 7.273628033

Subproblem 2

x + -5.402650355 = -1.870977678 Simplifying x + -5.402650355 = -1.870977678 Reorder the terms: -5.402650355 + x = -1.870977678 Solving -5.402650355 + x = -1.870977678 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.402650355' to each side of the equation. -5.402650355 + 5.402650355 + x = -1.870977678 + 5.402650355 Combine like terms: -5.402650355 + 5.402650355 = 0.000000000 0.000000000 + x = -1.870977678 + 5.402650355 x = -1.870977678 + 5.402650355 Combine like terms: -1.870977678 + 5.402650355 = 3.531672677 x = 3.531672677 Simplifying x = 3.531672677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.273628033, 3.531672677}

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