4x^2-35x-47=0

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Solution for 4x^2-35x-47=0 equation:


Simplifying
4x2 + -35x + -47 = 0

Reorder the terms:
-47 + -35x + 4x2 = 0

Solving
-47 + -35x + 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'.
-11.75 + -8.75x + x2 = 0

Move the constant term to the right:

Add '11.75' to each side of the equation.
-11.75 + -8.75x + 11.75 + x2 = 0 + 11.75

Reorder the terms:
-11.75 + 11.75 + -8.75x + x2 = 0 + 11.75

Combine like terms: -11.75 + 11.75 = 0.00
0.00 + -8.75x + x2 = 0 + 11.75
-8.75x + x2 = 0 + 11.75

Combine like terms: 0 + 11.75 = 11.75
-8.75x + x2 = 11.75

The x term is -8.75x.  Take half its coefficient (-4.375).
Square it (19.140625) and add it to both sides.

Add '19.140625' to each side of the equation.
-8.75x + 19.140625 + x2 = 11.75 + 19.140625

Reorder the terms:
19.140625 + -8.75x + x2 = 11.75 + 19.140625

Combine like terms: 11.75 + 19.140625 = 30.890625
19.140625 + -8.75x + x2 = 30.890625

Factor a perfect square on the left side:
(x + -4.375)(x + -4.375) = 30.890625

Calculate the square root of the right side: 5.557933519

Break this problem into two subproblems by setting 
(x + -4.375) equal to 5.557933519 and -5.557933519.

Subproblem 1

x + -4.375 = 5.557933519 Simplifying x + -4.375 = 5.557933519 Reorder the terms: -4.375 + x = 5.557933519 Solving -4.375 + x = 5.557933519 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.375' to each side of the equation. -4.375 + 4.375 + x = 5.557933519 + 4.375 Combine like terms: -4.375 + 4.375 = 0.000 0.000 + x = 5.557933519 + 4.375 x = 5.557933519 + 4.375 Combine like terms: 5.557933519 + 4.375 = 9.932933519 x = 9.932933519 Simplifying x = 9.932933519

Subproblem 2

x + -4.375 = -5.557933519 Simplifying x + -4.375 = -5.557933519 Reorder the terms: -4.375 + x = -5.557933519 Solving -4.375 + x = -5.557933519 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4.375' to each side of the equation. -4.375 + 4.375 + x = -5.557933519 + 4.375 Combine like terms: -4.375 + 4.375 = 0.000 0.000 + x = -5.557933519 + 4.375 x = -5.557933519 + 4.375 Combine like terms: -5.557933519 + 4.375 = -1.182933519 x = -1.182933519 Simplifying x = -1.182933519

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.932933519, -1.182933519}

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