4.9x^2-30x+23=0

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Solution for 4.9x^2-30x+23=0 equation:


Simplifying
4.9x2 + -30x + 23 = 0

Reorder the terms:
23 + -30x + 4.9x2 = 0

Solving
23 + -30x + 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'.
4.693877551 + -6.12244898x + x2 = 0

Move the constant term to the right:

Add '-4.693877551' to each side of the equation.
4.693877551 + -6.12244898x + -4.693877551 + x2 = 0 + -4.693877551

Reorder the terms:
4.693877551 + -4.693877551 + -6.12244898x + x2 = 0 + -4.693877551

Combine like terms: 4.693877551 + -4.693877551 = 0.000000000
0.000000000 + -6.12244898x + x2 = 0 + -4.693877551
-6.12244898x + x2 = 0 + -4.693877551

Combine like terms: 0 + -4.693877551 = -4.693877551
-6.12244898x + x2 = -4.693877551

The x term is -6.12244898x.  Take half its coefficient (-3.06122449).
Square it (9.371095378) and add it to both sides.

Add '9.371095378' to each side of the equation.
-6.12244898x + 9.371095378 + x2 = -4.693877551 + 9.371095378

Reorder the terms:
9.371095378 + -6.12244898x + x2 = -4.693877551 + 9.371095378

Combine like terms: -4.693877551 + 9.371095378 = 4.677217827
9.371095378 + -6.12244898x + x2 = 4.677217827

Factor a perfect square on the left side:
(x + -3.06122449)(x + -3.06122449) = 4.677217827

Calculate the square root of the right side: 2.16268764

Break this problem into two subproblems by setting 
(x + -3.06122449) equal to 2.16268764 and -2.16268764.

Subproblem 1

x + -3.06122449 = 2.16268764 Simplifying x + -3.06122449 = 2.16268764 Reorder the terms: -3.06122449 + x = 2.16268764 Solving -3.06122449 + x = 2.16268764 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.06122449' to each side of the equation. -3.06122449 + 3.06122449 + x = 2.16268764 + 3.06122449 Combine like terms: -3.06122449 + 3.06122449 = 0.00000000 0.00000000 + x = 2.16268764 + 3.06122449 x = 2.16268764 + 3.06122449 Combine like terms: 2.16268764 + 3.06122449 = 5.22391213 x = 5.22391213 Simplifying x = 5.22391213

Subproblem 2

x + -3.06122449 = -2.16268764 Simplifying x + -3.06122449 = -2.16268764 Reorder the terms: -3.06122449 + x = -2.16268764 Solving -3.06122449 + x = -2.16268764 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.06122449' to each side of the equation. -3.06122449 + 3.06122449 + x = -2.16268764 + 3.06122449 Combine like terms: -3.06122449 + 3.06122449 = 0.00000000 0.00000000 + x = -2.16268764 + 3.06122449 x = -2.16268764 + 3.06122449 Combine like terms: -2.16268764 + 3.06122449 = 0.89853685 x = 0.89853685 Simplifying x = 0.89853685

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.22391213, 0.89853685}

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