5x^2+25x+3=0

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Solution for 5x^2+25x+3=0 equation:


Simplifying
5x2 + 25x + 3 = 0

Reorder the terms:
3 + 25x + 5x2 = 0

Solving
3 + 25x + 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'.
0.6 + 5x + x2 = 0

Move the constant term to the right:

Add '-0.6' to each side of the equation.
0.6 + 5x + -0.6 + x2 = 0 + -0.6

Reorder the terms:
0.6 + -0.6 + 5x + x2 = 0 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + 5x + x2 = 0 + -0.6
5x + x2 = 0 + -0.6

Combine like terms: 0 + -0.6 = -0.6
5x + x2 = -0.6

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = -0.6 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -0.6 + 6.25

Combine like terms: -0.6 + 6.25 = 5.65
6.25 + 5x + x2 = 5.65

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 5.65

Calculate the square root of the right side: 2.376972865

Break this problem into two subproblems by setting 
(x + 2.5) equal to 2.376972865 and -2.376972865.

Subproblem 1

x + 2.5 = 2.376972865 Simplifying x + 2.5 = 2.376972865 Reorder the terms: 2.5 + x = 2.376972865 Solving 2.5 + x = 2.376972865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 2.376972865 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 2.376972865 + -2.5 x = 2.376972865 + -2.5 Combine like terms: 2.376972865 + -2.5 = -0.123027135 x = -0.123027135 Simplifying x = -0.123027135

Subproblem 2

x + 2.5 = -2.376972865 Simplifying x + 2.5 = -2.376972865 Reorder the terms: 2.5 + x = -2.376972865 Solving 2.5 + x = -2.376972865 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -2.376972865 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -2.376972865 + -2.5 x = -2.376972865 + -2.5 Combine like terms: -2.376972865 + -2.5 = -4.876972865 x = -4.876972865 Simplifying x = -4.876972865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.123027135, -4.876972865}

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