(5x+2)(5x+2)=48

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Solution for (5x+2)(5x+2)=48 equation:


Simplifying
(5x + 2)(5x + 2) = 48

Reorder the terms:
(2 + 5x)(5x + 2) = 48

Reorder the terms:
(2 + 5x)(2 + 5x) = 48

Multiply (2 + 5x) * (2 + 5x)
(2(2 + 5x) + 5x * (2 + 5x)) = 48
((2 * 2 + 5x * 2) + 5x * (2 + 5x)) = 48
((4 + 10x) + 5x * (2 + 5x)) = 48
(4 + 10x + (2 * 5x + 5x * 5x)) = 48
(4 + 10x + (10x + 25x2)) = 48

Combine like terms: 10x + 10x = 20x
(4 + 20x + 25x2) = 48

Solving
4 + 20x + 25x2 = 48

Solving for variable 'x'.

Reorder the terms:
4 + -48 + 20x + 25x2 = 48 + -48

Combine like terms: 4 + -48 = -44
-44 + 20x + 25x2 = 48 + -48

Combine like terms: 48 + -48 = 0
-44 + 20x + 25x2 = 0

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

Divide each side by '25'.
-1.76 + 0.8x + x2 = 0

Move the constant term to the right:

Add '1.76' to each side of the equation.
-1.76 + 0.8x + 1.76 + x2 = 0 + 1.76

Reorder the terms:
-1.76 + 1.76 + 0.8x + x2 = 0 + 1.76

Combine like terms: -1.76 + 1.76 = 0.00
0.00 + 0.8x + x2 = 0 + 1.76
0.8x + x2 = 0 + 1.76

Combine like terms: 0 + 1.76 = 1.76
0.8x + x2 = 1.76

The x term is 0.8x.  Take half its coefficient (0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
0.8x + 0.16 + x2 = 1.76 + 0.16

Reorder the terms:
0.16 + 0.8x + x2 = 1.76 + 0.16

Combine like terms: 1.76 + 0.16 = 1.92
0.16 + 0.8x + x2 = 1.92

Factor a perfect square on the left side:
(x + 0.4)(x + 0.4) = 1.92

Calculate the square root of the right side: 1.385640646

Break this problem into two subproblems by setting 
(x + 0.4) equal to 1.385640646 and -1.385640646.

Subproblem 1

x + 0.4 = 1.385640646 Simplifying x + 0.4 = 1.385640646 Reorder the terms: 0.4 + x = 1.385640646 Solving 0.4 + x = 1.385640646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + x = 1.385640646 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + x = 1.385640646 + -0.4 x = 1.385640646 + -0.4 Combine like terms: 1.385640646 + -0.4 = 0.985640646 x = 0.985640646 Simplifying x = 0.985640646

Subproblem 2

x + 0.4 = -1.385640646 Simplifying x + 0.4 = -1.385640646 Reorder the terms: 0.4 + x = -1.385640646 Solving 0.4 + x = -1.385640646 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4' to each side of the equation. 0.4 + -0.4 + x = -1.385640646 + -0.4 Combine like terms: 0.4 + -0.4 = 0.0 0.0 + x = -1.385640646 + -0.4 x = -1.385640646 + -0.4 Combine like terms: -1.385640646 + -0.4 = -1.785640646 x = -1.785640646 Simplifying x = -1.785640646

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.985640646, -1.785640646}

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