5x^2+42x+32=0

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Solution for 5x^2+42x+32=0 equation:


Simplifying
5x2 + 42x + 32 = 0

Reorder the terms:
32 + 42x + 5x2 = 0

Solving
32 + 42x + 5x2 = 0

Solving for variable 'x'.

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

Divide each side by '5'.
6.4 + 8.4x + x2 = 0

Move the constant term to the right:

Add '-6.4' to each side of the equation.
6.4 + 8.4x + -6.4 + x2 = 0 + -6.4

Reorder the terms:
6.4 + -6.4 + 8.4x + x2 = 0 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + 8.4x + x2 = 0 + -6.4
8.4x + x2 = 0 + -6.4

Combine like terms: 0 + -6.4 = -6.4
8.4x + x2 = -6.4

The x term is 8.4x.  Take half its coefficient (4.2).
Square it (17.64) and add it to both sides.

Add '17.64' to each side of the equation.
8.4x + 17.64 + x2 = -6.4 + 17.64

Reorder the terms:
17.64 + 8.4x + x2 = -6.4 + 17.64

Combine like terms: -6.4 + 17.64 = 11.24
17.64 + 8.4x + x2 = 11.24

Factor a perfect square on the left side:
(x + 4.2)(x + 4.2) = 11.24

Calculate the square root of the right side: 3.352610923

Break this problem into two subproblems by setting 
(x + 4.2) equal to 3.352610923 and -3.352610923.

Subproblem 1

x + 4.2 = 3.352610923 Simplifying x + 4.2 = 3.352610923 Reorder the terms: 4.2 + x = 3.352610923 Solving 4.2 + x = 3.352610923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.2' to each side of the equation. 4.2 + -4.2 + x = 3.352610923 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + x = 3.352610923 + -4.2 x = 3.352610923 + -4.2 Combine like terms: 3.352610923 + -4.2 = -0.847389077 x = -0.847389077 Simplifying x = -0.847389077

Subproblem 2

x + 4.2 = -3.352610923 Simplifying x + 4.2 = -3.352610923 Reorder the terms: 4.2 + x = -3.352610923 Solving 4.2 + x = -3.352610923 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.2' to each side of the equation. 4.2 + -4.2 + x = -3.352610923 + -4.2 Combine like terms: 4.2 + -4.2 = 0.0 0.0 + x = -3.352610923 + -4.2 x = -3.352610923 + -4.2 Combine like terms: -3.352610923 + -4.2 = -7.552610923 x = -7.552610923 Simplifying x = -7.552610923

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.847389077, -7.552610923}

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