(5x-3)(5x-3)=31

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Solution for (5x-3)(5x-3)=31 equation:


Simplifying
(5x + -3)(5x + -3) = 31

Reorder the terms:
(-3 + 5x)(5x + -3) = 31

Reorder the terms:
(-3 + 5x)(-3 + 5x) = 31

Multiply (-3 + 5x) * (-3 + 5x)
(-3(-3 + 5x) + 5x * (-3 + 5x)) = 31
((-3 * -3 + 5x * -3) + 5x * (-3 + 5x)) = 31
((9 + -15x) + 5x * (-3 + 5x)) = 31
(9 + -15x + (-3 * 5x + 5x * 5x)) = 31
(9 + -15x + (-15x + 25x2)) = 31

Combine like terms: -15x + -15x = -30x
(9 + -30x + 25x2) = 31

Solving
9 + -30x + 25x2 = 31

Solving for variable 'x'.

Reorder the terms:
9 + -31 + -30x + 25x2 = 31 + -31

Combine like terms: 9 + -31 = -22
-22 + -30x + 25x2 = 31 + -31

Combine like terms: 31 + -31 = 0
-22 + -30x + 25x2 = 0

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

Divide each side by '25'.
-0.88 + -1.2x + x2 = 0

Move the constant term to the right:

Add '0.88' to each side of the equation.
-0.88 + -1.2x + 0.88 + x2 = 0 + 0.88

Reorder the terms:
-0.88 + 0.88 + -1.2x + x2 = 0 + 0.88

Combine like terms: -0.88 + 0.88 = 0.00
0.00 + -1.2x + x2 = 0 + 0.88
-1.2x + x2 = 0 + 0.88

Combine like terms: 0 + 0.88 = 0.88
-1.2x + x2 = 0.88

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 = 0.88 + 0.36

Reorder the terms:
0.36 + -1.2x + x2 = 0.88 + 0.36

Combine like terms: 0.88 + 0.36 = 1.24
0.36 + -1.2x + x2 = 1.24

Factor a perfect square on the left side:
(x + -0.6)(x + -0.6) = 1.24

Calculate the square root of the right side: 1.113552873

Break this problem into two subproblems by setting 
(x + -0.6) equal to 1.113552873 and -1.113552873.

Subproblem 1

x + -0.6 = 1.113552873 Simplifying x + -0.6 = 1.113552873 Reorder the terms: -0.6 + x = 1.113552873 Solving -0.6 + x = 1.113552873 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 = 1.113552873 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = 1.113552873 + 0.6 x = 1.113552873 + 0.6 Combine like terms: 1.113552873 + 0.6 = 1.713552873 x = 1.713552873 Simplifying x = 1.713552873

Subproblem 2

x + -0.6 = -1.113552873 Simplifying x + -0.6 = -1.113552873 Reorder the terms: -0.6 + x = -1.113552873 Solving -0.6 + x = -1.113552873 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 = -1.113552873 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + x = -1.113552873 + 0.6 x = -1.113552873 + 0.6 Combine like terms: -1.113552873 + 0.6 = -0.513552873 x = -0.513552873 Simplifying x = -0.513552873

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.713552873, -0.513552873}

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