4x^2+23x-55=

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Solution for 4x^2+23x-55= equation:


Simplifying
4x2 + 23x + -55 = 0

Reorder the terms:
-55 + 23x + 4x2 = 0

Solving
-55 + 23x + 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'.
-13.75 + 5.75x + x2 = 0

Move the constant term to the right:

Add '13.75' to each side of the equation.
-13.75 + 5.75x + 13.75 + x2 = 0 + 13.75

Reorder the terms:
-13.75 + 13.75 + 5.75x + x2 = 0 + 13.75

Combine like terms: -13.75 + 13.75 = 0.00
0.00 + 5.75x + x2 = 0 + 13.75
5.75x + x2 = 0 + 13.75

Combine like terms: 0 + 13.75 = 13.75
5.75x + x2 = 13.75

The x term is 5.75x.  Take half its coefficient (2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
5.75x + 8.265625 + x2 = 13.75 + 8.265625

Reorder the terms:
8.265625 + 5.75x + x2 = 13.75 + 8.265625

Combine like terms: 13.75 + 8.265625 = 22.015625
8.265625 + 5.75x + x2 = 22.015625

Factor a perfect square on the left side:
(x + 2.875)(x + 2.875) = 22.015625

Calculate the square root of the right side: 4.692081095

Break this problem into two subproblems by setting 
(x + 2.875) equal to 4.692081095 and -4.692081095.

Subproblem 1

x + 2.875 = 4.692081095 Simplifying x + 2.875 = 4.692081095 Reorder the terms: 2.875 + x = 4.692081095 Solving 2.875 + x = 4.692081095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = 4.692081095 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = 4.692081095 + -2.875 x = 4.692081095 + -2.875 Combine like terms: 4.692081095 + -2.875 = 1.817081095 x = 1.817081095 Simplifying x = 1.817081095

Subproblem 2

x + 2.875 = -4.692081095 Simplifying x + 2.875 = -4.692081095 Reorder the terms: 2.875 + x = -4.692081095 Solving 2.875 + x = -4.692081095 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.875' to each side of the equation. 2.875 + -2.875 + x = -4.692081095 + -2.875 Combine like terms: 2.875 + -2.875 = 0.000 0.000 + x = -4.692081095 + -2.875 x = -4.692081095 + -2.875 Combine like terms: -4.692081095 + -2.875 = -7.567081095 x = -7.567081095 Simplifying x = -7.567081095

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.817081095, -7.567081095}

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