x^2+16x+43=0

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Solution for x^2+16x+43=0 equation:


Simplifying
x2 + 16x + 43 = 0

Reorder the terms:
43 + 16x + x2 = 0

Solving
43 + 16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-43' to each side of the equation.
43 + 16x + -43 + x2 = 0 + -43

Reorder the terms:
43 + -43 + 16x + x2 = 0 + -43

Combine like terms: 43 + -43 = 0
0 + 16x + x2 = 0 + -43
16x + x2 = 0 + -43

Combine like terms: 0 + -43 = -43
16x + x2 = -43

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = -43 + 64

Reorder the terms:
64 + 16x + x2 = -43 + 64

Combine like terms: -43 + 64 = 21
64 + 16x + x2 = 21

Factor a perfect square on the left side:
(x + 8)(x + 8) = 21

Calculate the square root of the right side: 4.582575695

Break this problem into two subproblems by setting 
(x + 8) equal to 4.582575695 and -4.582575695.

Subproblem 1

x + 8 = 4.582575695 Simplifying x + 8 = 4.582575695 Reorder the terms: 8 + x = 4.582575695 Solving 8 + x = 4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 4.582575695 + -8 Combine like terms: 8 + -8 = 0 0 + x = 4.582575695 + -8 x = 4.582575695 + -8 Combine like terms: 4.582575695 + -8 = -3.417424305 x = -3.417424305 Simplifying x = -3.417424305

Subproblem 2

x + 8 = -4.582575695 Simplifying x + 8 = -4.582575695 Reorder the terms: 8 + x = -4.582575695 Solving 8 + x = -4.582575695 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -4.582575695 + -8 Combine like terms: 8 + -8 = 0 0 + x = -4.582575695 + -8 x = -4.582575695 + -8 Combine like terms: -4.582575695 + -8 = -12.582575695 x = -12.582575695 Simplifying x = -12.582575695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-3.417424305, -12.582575695}

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