(5x+3)(5x+3)=3

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Solution for (5x+3)(5x+3)=3 equation:


Simplifying
(5x + 3)(5x + 3) = 3

Reorder the terms:
(3 + 5x)(5x + 3) = 3

Reorder the terms:
(3 + 5x)(3 + 5x) = 3

Multiply (3 + 5x) * (3 + 5x)
(3(3 + 5x) + 5x * (3 + 5x)) = 3
((3 * 3 + 5x * 3) + 5x * (3 + 5x)) = 3
((9 + 15x) + 5x * (3 + 5x)) = 3
(9 + 15x + (3 * 5x + 5x * 5x)) = 3
(9 + 15x + (15x + 25x2)) = 3

Combine like terms: 15x + 15x = 30x
(9 + 30x + 25x2) = 3

Solving
9 + 30x + 25x2 = 3

Solving for variable 'x'.

Reorder the terms:
9 + -3 + 30x + 25x2 = 3 + -3

Combine like terms: 9 + -3 = 6
6 + 30x + 25x2 = 3 + -3

Combine like terms: 3 + -3 = 0
6 + 30x + 25x2 = 0

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

Divide each side by '25'.
0.24 + 1.2x + x2 = 0

Move the constant term to the right:

Add '-0.24' to each side of the equation.
0.24 + 1.2x + -0.24 + x2 = 0 + -0.24

Reorder the terms:
0.24 + -0.24 + 1.2x + x2 = 0 + -0.24

Combine like terms: 0.24 + -0.24 = 0.00
0.00 + 1.2x + x2 = 0 + -0.24
1.2x + x2 = 0 + -0.24

Combine like terms: 0 + -0.24 = -0.24
1.2x + x2 = -0.24

The x term is 1.2x.  Take half its coefficient (0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
1.2x + 0.36 + x2 = -0.24 + 0.36

Reorder the terms:
0.36 + 1.2x + x2 = -0.24 + 0.36

Combine like terms: -0.24 + 0.36 = 0.12
0.36 + 1.2x + x2 = 0.12

Factor a perfect square on the left side:
(x + 0.6)(x + 0.6) = 0.12

Calculate the square root of the right side: 0.346410162

Break this problem into two subproblems by setting 
(x + 0.6) equal to 0.346410162 and -0.346410162.

Subproblem 1

x + 0.6 = 0.346410162 Simplifying x + 0.6 = 0.346410162 Reorder the terms: 0.6 + x = 0.346410162 Solving 0.6 + x = 0.346410162 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = 0.346410162 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = 0.346410162 + -0.6 x = 0.346410162 + -0.6 Combine like terms: 0.346410162 + -0.6 = -0.253589838 x = -0.253589838 Simplifying x = -0.253589838

Subproblem 2

x + 0.6 = -0.346410162 Simplifying x + 0.6 = -0.346410162 Reorder the terms: 0.6 + x = -0.346410162 Solving 0.6 + x = -0.346410162 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.6' to each side of the equation. 0.6 + -0.6 + x = -0.346410162 + -0.6 Combine like terms: 0.6 + -0.6 = 0.0 0.0 + x = -0.346410162 + -0.6 x = -0.346410162 + -0.6 Combine like terms: -0.346410162 + -0.6 = -0.946410162 x = -0.946410162 Simplifying x = -0.946410162

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-0.253589838, -0.946410162}

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