(9x-4)(9x-4)=17

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Solution for (9x-4)(9x-4)=17 equation:


Simplifying
(9x + -4)(9x + -4) = 17

Reorder the terms:
(-4 + 9x)(9x + -4) = 17

Reorder the terms:
(-4 + 9x)(-4 + 9x) = 17

Multiply (-4 + 9x) * (-4 + 9x)
(-4(-4 + 9x) + 9x * (-4 + 9x)) = 17
((-4 * -4 + 9x * -4) + 9x * (-4 + 9x)) = 17
((16 + -36x) + 9x * (-4 + 9x)) = 17
(16 + -36x + (-4 * 9x + 9x * 9x)) = 17
(16 + -36x + (-36x + 81x2)) = 17

Combine like terms: -36x + -36x = -72x
(16 + -72x + 81x2) = 17

Solving
16 + -72x + 81x2 = 17

Solving for variable 'x'.

Reorder the terms:
16 + -17 + -72x + 81x2 = 17 + -17

Combine like terms: 16 + -17 = -1
-1 + -72x + 81x2 = 17 + -17

Combine like terms: 17 + -17 = 0
-1 + -72x + 81x2 = 0

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

Divide each side by '81'.
-0.01234567901 + -0.8888888889x + x2 = 0

Move the constant term to the right:

Add '0.01234567901' to each side of the equation.
-0.01234567901 + -0.8888888889x + 0.01234567901 + x2 = 0 + 0.01234567901

Reorder the terms:
-0.01234567901 + 0.01234567901 + -0.8888888889x + x2 = 0 + 0.01234567901

Combine like terms: -0.01234567901 + 0.01234567901 = 0.00000000000
0.00000000000 + -0.8888888889x + x2 = 0 + 0.01234567901
-0.8888888889x + x2 = 0 + 0.01234567901

Combine like terms: 0 + 0.01234567901 = 0.01234567901
-0.8888888889x + x2 = 0.01234567901

The x term is -0.8888888889x.  Take half its coefficient (-0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
-0.8888888889x + 0.1975308642 + x2 = 0.01234567901 + 0.1975308642

Reorder the terms:
0.1975308642 + -0.8888888889x + x2 = 0.01234567901 + 0.1975308642

Combine like terms: 0.01234567901 + 0.1975308642 = 0.20987654321
0.1975308642 + -0.8888888889x + x2 = 0.20987654321

Factor a perfect square on the left side:
(x + -0.4444444445)(x + -0.4444444445) = 0.20987654321

Calculate the square root of the right side: 0.458122847

Break this problem into two subproblems by setting 
(x + -0.4444444445) equal to 0.458122847 and -0.458122847.

Subproblem 1

x + -0.4444444445 = 0.458122847 Simplifying x + -0.4444444445 = 0.458122847 Reorder the terms: -0.4444444445 + x = 0.458122847 Solving -0.4444444445 + x = 0.458122847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + x = 0.458122847 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + x = 0.458122847 + 0.4444444445 x = 0.458122847 + 0.4444444445 Combine like terms: 0.458122847 + 0.4444444445 = 0.9025672915 x = 0.9025672915 Simplifying x = 0.9025672915

Subproblem 2

x + -0.4444444445 = -0.458122847 Simplifying x + -0.4444444445 = -0.458122847 Reorder the terms: -0.4444444445 + x = -0.458122847 Solving -0.4444444445 + x = -0.458122847 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + x = -0.458122847 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + x = -0.458122847 + 0.4444444445 x = -0.458122847 + 0.4444444445 Combine like terms: -0.458122847 + 0.4444444445 = -0.0136784025 x = -0.0136784025 Simplifying x = -0.0136784025

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.9025672915, -0.0136784025}

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