-4.9x^2+34.3x-58.0=0

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Solution for -4.9x^2+34.3x-58.0=0 equation:


Simplifying
-4.9x2 + 34.3x + -58.0 = 0

Reorder the terms:
-58.0 + 34.3x + -4.9x2 = 0

Solving
-58.0 + 34.3x + -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'.
11.83673469 + -7x + x2 = 0

Move the constant term to the right:

Add '-11.83673469' to each side of the equation.
11.83673469 + -7x + -11.83673469 + x2 = 0 + -11.83673469

Reorder the terms:
11.83673469 + -11.83673469 + -7x + x2 = 0 + -11.83673469

Combine like terms: 11.83673469 + -11.83673469 = 0.00000000
0.00000000 + -7x + x2 = 0 + -11.83673469
-7x + x2 = 0 + -11.83673469

Combine like terms: 0 + -11.83673469 = -11.83673469
-7x + x2 = -11.83673469

The x term is -7x.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7x + 12.25 + x2 = -11.83673469 + 12.25

Reorder the terms:
12.25 + -7x + x2 = -11.83673469 + 12.25

Combine like terms: -11.83673469 + 12.25 = 0.41326531
12.25 + -7x + x2 = 0.41326531

Factor a perfect square on the left side:
(x + -3.5)(x + -3.5) = 0.41326531

Calculate the square root of the right side: 0.642857146

Break this problem into two subproblems by setting 
(x + -3.5) equal to 0.642857146 and -0.642857146.

Subproblem 1

x + -3.5 = 0.642857146 Simplifying x + -3.5 = 0.642857146 Reorder the terms: -3.5 + x = 0.642857146 Solving -3.5 + x = 0.642857146 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = 0.642857146 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = 0.642857146 + 3.5 x = 0.642857146 + 3.5 Combine like terms: 0.642857146 + 3.5 = 4.142857146 x = 4.142857146 Simplifying x = 4.142857146

Subproblem 2

x + -3.5 = -0.642857146 Simplifying x + -3.5 = -0.642857146 Reorder the terms: -3.5 + x = -0.642857146 Solving -3.5 + x = -0.642857146 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + x = -0.642857146 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + x = -0.642857146 + 3.5 x = -0.642857146 + 3.5 Combine like terms: -0.642857146 + 3.5 = 2.857142854 x = 2.857142854 Simplifying x = 2.857142854

Solution

The solution to the problem is based on the solutions from the subproblems. x = {4.142857146, 2.857142854}

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