4x^2-39x+5=0

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Solution for 4x^2-39x+5=0 equation:


Simplifying
4x2 + -39x + 5 = 0

Reorder the terms:
5 + -39x + 4x2 = 0

Solving
5 + -39x + 4x2 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
1.25 + -9.75x + x2 = 0

Move the constant term to the right:

Add '-1.25' to each side of the equation.
1.25 + -9.75x + -1.25 + x2 = 0 + -1.25

Reorder the terms:
1.25 + -1.25 + -9.75x + x2 = 0 + -1.25

Combine like terms: 1.25 + -1.25 = 0.00
0.00 + -9.75x + x2 = 0 + -1.25
-9.75x + x2 = 0 + -1.25

Combine like terms: 0 + -1.25 = -1.25
-9.75x + x2 = -1.25

The x term is -9.75x.  Take half its coefficient (-4.875).
Square it (23.765625) and add it to both sides.

Add '23.765625' to each side of the equation.
-9.75x + 23.765625 + x2 = -1.25 + 23.765625

Reorder the terms:
23.765625 + -9.75x + x2 = -1.25 + 23.765625

Combine like terms: -1.25 + 23.765625 = 22.515625
23.765625 + -9.75x + x2 = 22.515625

Factor a perfect square on the left side:
(x + -4.875)(x + -4.875) = 22.515625

Calculate the square root of the right side: 4.745063224

Break this problem into two subproblems by setting 
(x + -4.875) equal to 4.745063224 and -4.745063224.

Subproblem 1

x + -4.875 = 4.745063224 Simplifying x + -4.875 = 4.745063224 Reorder the terms: -4.875 + x = 4.745063224 Solving -4.875 + x = 4.745063224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = 4.745063224 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = 4.745063224 + 4.875 x = 4.745063224 + 4.875 Combine like terms: 4.745063224 + 4.875 = 9.620063224 x = 9.620063224 Simplifying x = 9.620063224

Subproblem 2

x + -4.875 = -4.745063224 Simplifying x + -4.875 = -4.745063224 Reorder the terms: -4.875 + x = -4.745063224 Solving -4.875 + x = -4.745063224 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.875' to each side of the equation. -4.875 + 4.875 + x = -4.745063224 + 4.875 Combine like terms: -4.875 + 4.875 = 0.000 0.000 + x = -4.745063224 + 4.875 x = -4.745063224 + 4.875 Combine like terms: -4.745063224 + 4.875 = 0.129936776 x = 0.129936776 Simplifying x = 0.129936776

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.620063224, 0.129936776}

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