4x^2+43x+89=0

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Solution for 4x^2+43x+89=0 equation:


Simplifying
4x2 + 43x + 89 = 0

Reorder the terms:
89 + 43x + 4x2 = 0

Solving
89 + 43x + 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'.
22.25 + 10.75x + x2 = 0

Move the constant term to the right:

Add '-22.25' to each side of the equation.
22.25 + 10.75x + -22.25 + x2 = 0 + -22.25

Reorder the terms:
22.25 + -22.25 + 10.75x + x2 = 0 + -22.25

Combine like terms: 22.25 + -22.25 = 0.00
0.00 + 10.75x + x2 = 0 + -22.25
10.75x + x2 = 0 + -22.25

Combine like terms: 0 + -22.25 = -22.25
10.75x + x2 = -22.25

The x term is 10.75x.  Take half its coefficient (5.375).
Square it (28.890625) and add it to both sides.

Add '28.890625' to each side of the equation.
10.75x + 28.890625 + x2 = -22.25 + 28.890625

Reorder the terms:
28.890625 + 10.75x + x2 = -22.25 + 28.890625

Combine like terms: -22.25 + 28.890625 = 6.640625
28.890625 + 10.75x + x2 = 6.640625

Factor a perfect square on the left side:
(x + 5.375)(x + 5.375) = 6.640625

Calculate the square root of the right side: 2.576941016

Break this problem into two subproblems by setting 
(x + 5.375) equal to 2.576941016 and -2.576941016.

Subproblem 1

x + 5.375 = 2.576941016 Simplifying x + 5.375 = 2.576941016 Reorder the terms: 5.375 + x = 2.576941016 Solving 5.375 + x = 2.576941016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + x = 2.576941016 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + x = 2.576941016 + -5.375 x = 2.576941016 + -5.375 Combine like terms: 2.576941016 + -5.375 = -2.798058984 x = -2.798058984 Simplifying x = -2.798058984

Subproblem 2

x + 5.375 = -2.576941016 Simplifying x + 5.375 = -2.576941016 Reorder the terms: 5.375 + x = -2.576941016 Solving 5.375 + x = -2.576941016 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + x = -2.576941016 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + x = -2.576941016 + -5.375 x = -2.576941016 + -5.375 Combine like terms: -2.576941016 + -5.375 = -7.951941016 x = -7.951941016 Simplifying x = -7.951941016

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.798058984, -7.951941016}

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