5x^2+32x+40=

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Solution for 5x^2+32x+40= equation:


Simplifying
5x2 + 32x + 40 = 0

Reorder the terms:
40 + 32x + 5x2 = 0

Solving
40 + 32x + 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'.
8 + 6.4x + x2 = 0

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 6.4x + -8 + x2 = 0 + -8

Reorder the terms:
8 + -8 + 6.4x + x2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 6.4x + x2 = 0 + -8
6.4x + x2 = 0 + -8

Combine like terms: 0 + -8 = -8
6.4x + x2 = -8

The x term is 6.4x.  Take half its coefficient (3.2).
Square it (10.24) and add it to both sides.

Add '10.24' to each side of the equation.
6.4x + 10.24 + x2 = -8 + 10.24

Reorder the terms:
10.24 + 6.4x + x2 = -8 + 10.24

Combine like terms: -8 + 10.24 = 2.24
10.24 + 6.4x + x2 = 2.24

Factor a perfect square on the left side:
(x + 3.2)(x + 3.2) = 2.24

Calculate the square root of the right side: 1.496662955

Break this problem into two subproblems by setting 
(x + 3.2) equal to 1.496662955 and -1.496662955.

Subproblem 1

x + 3.2 = 1.496662955 Simplifying x + 3.2 = 1.496662955 Reorder the terms: 3.2 + x = 1.496662955 Solving 3.2 + x = 1.496662955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.2' to each side of the equation. 3.2 + -3.2 + x = 1.496662955 + -3.2 Combine like terms: 3.2 + -3.2 = 0.0 0.0 + x = 1.496662955 + -3.2 x = 1.496662955 + -3.2 Combine like terms: 1.496662955 + -3.2 = -1.703337045 x = -1.703337045 Simplifying x = -1.703337045

Subproblem 2

x + 3.2 = -1.496662955 Simplifying x + 3.2 = -1.496662955 Reorder the terms: 3.2 + x = -1.496662955 Solving 3.2 + x = -1.496662955 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.2' to each side of the equation. 3.2 + -3.2 + x = -1.496662955 + -3.2 Combine like terms: 3.2 + -3.2 = 0.0 0.0 + x = -1.496662955 + -3.2 x = -1.496662955 + -3.2 Combine like terms: -1.496662955 + -3.2 = -4.696662955 x = -4.696662955 Simplifying x = -4.696662955

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-1.703337045, -4.696662955}

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