0=62+14x-4.9x^2

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Solution for 0=62+14x-4.9x^2 equation:


Simplifying
0 = 62 + 14x + -4.9x2

Solving
0 = 62 + 14x + -4.9x2

Solving for variable 'x'.

Combine like terms: 0 + -62 = -62
-62 + -14x + 4.9x2 = 62 + 14x + -4.9x2 + -62 + -14x + 4.9x2

Reorder the terms:
-62 + -14x + 4.9x2 = 62 + -62 + 14x + -14x + -4.9x2 + 4.9x2

Combine like terms: 62 + -62 = 0
-62 + -14x + 4.9x2 = 0 + 14x + -14x + -4.9x2 + 4.9x2
-62 + -14x + 4.9x2 = 14x + -14x + -4.9x2 + 4.9x2

Combine like terms: 14x + -14x = 0
-62 + -14x + 4.9x2 = 0 + -4.9x2 + 4.9x2
-62 + -14x + 4.9x2 = -4.9x2 + 4.9x2

Combine like terms: -4.9x2 + 4.9x2 = 0.0
-62 + -14x + 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'.
-12.65306122 + -2.857142857x + x2 = 0

Move the constant term to the right:

Add '12.65306122' to each side of the equation.
-12.65306122 + -2.857142857x + 12.65306122 + x2 = 0 + 12.65306122

Reorder the terms:
-12.65306122 + 12.65306122 + -2.857142857x + x2 = 0 + 12.65306122

Combine like terms: -12.65306122 + 12.65306122 = 0.00000000
0.00000000 + -2.857142857x + x2 = 0 + 12.65306122
-2.857142857x + x2 = 0 + 12.65306122

Combine like terms: 0 + 12.65306122 = 12.65306122
-2.857142857x + x2 = 12.65306122

The x term is -2.857142857x.  Take half its coefficient (-1.428571429).
Square it (2.040816328) and add it to both sides.

Add '2.040816328' to each side of the equation.
-2.857142857x + 2.040816328 + x2 = 12.65306122 + 2.040816328

Reorder the terms:
2.040816328 + -2.857142857x + x2 = 12.65306122 + 2.040816328

Combine like terms: 12.65306122 + 2.040816328 = 14.693877548
2.040816328 + -2.857142857x + x2 = 14.693877548

Factor a perfect square on the left side:
(x + -1.428571429)(x + -1.428571429) = 14.693877548

Calculate the square root of the right side: 3.83325939

Break this problem into two subproblems by setting 
(x + -1.428571429) equal to 3.83325939 and -3.83325939.

Subproblem 1

x + -1.428571429 = 3.83325939 Simplifying x + -1.428571429 = 3.83325939 Reorder the terms: -1.428571429 + x = 3.83325939 Solving -1.428571429 + x = 3.83325939 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = 3.83325939 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = 3.83325939 + 1.428571429 x = 3.83325939 + 1.428571429 Combine like terms: 3.83325939 + 1.428571429 = 5.261830819 x = 5.261830819 Simplifying x = 5.261830819

Subproblem 2

x + -1.428571429 = -3.83325939 Simplifying x + -1.428571429 = -3.83325939 Reorder the terms: -1.428571429 + x = -3.83325939 Solving -1.428571429 + x = -3.83325939 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.428571429' to each side of the equation. -1.428571429 + 1.428571429 + x = -3.83325939 + 1.428571429 Combine like terms: -1.428571429 + 1.428571429 = 0.000000000 0.000000000 + x = -3.83325939 + 1.428571429 x = -3.83325939 + 1.428571429 Combine like terms: -3.83325939 + 1.428571429 = -2.404687961 x = -2.404687961 Simplifying x = -2.404687961

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.261830819, -2.404687961}

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