8x(4+2x)=9x+17

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Solution for 8x(4+2x)=9x+17 equation:


Simplifying
8x(4 + 2x) = 9x + 17
(4 * 8x + 2x * 8x) = 9x + 17
(32x + 16x2) = 9x + 17

Reorder the terms:
32x + 16x2 = 17 + 9x

Solving
32x + 16x2 = 17 + 9x

Solving for variable 'x'.

Reorder the terms:
-17 + 32x + -9x + 16x2 = 17 + 9x + -17 + -9x

Combine like terms: 32x + -9x = 23x
-17 + 23x + 16x2 = 17 + 9x + -17 + -9x

Reorder the terms:
-17 + 23x + 16x2 = 17 + -17 + 9x + -9x

Combine like terms: 17 + -17 = 0
-17 + 23x + 16x2 = 0 + 9x + -9x
-17 + 23x + 16x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-17 + 23x + 16x2 = 0

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

Divide each side by '16'.
-1.0625 + 1.4375x + x2 = 0

Move the constant term to the right:

Add '1.0625' to each side of the equation.
-1.0625 + 1.4375x + 1.0625 + x2 = 0 + 1.0625

Reorder the terms:
-1.0625 + 1.0625 + 1.4375x + x2 = 0 + 1.0625

Combine like terms: -1.0625 + 1.0625 = 0.0000
0.0000 + 1.4375x + x2 = 0 + 1.0625
1.4375x + x2 = 0 + 1.0625

Combine like terms: 0 + 1.0625 = 1.0625
1.4375x + x2 = 1.0625

The x term is 1.4375x.  Take half its coefficient (0.71875).
Square it (0.5166015625) and add it to both sides.

Add '0.5166015625' to each side of the equation.
1.4375x + 0.5166015625 + x2 = 1.0625 + 0.5166015625

Reorder the terms:
0.5166015625 + 1.4375x + x2 = 1.0625 + 0.5166015625

Combine like terms: 1.0625 + 0.5166015625 = 1.5791015625
0.5166015625 + 1.4375x + x2 = 1.5791015625

Factor a perfect square on the left side:
(x + 0.71875)(x + 0.71875) = 1.5791015625

Calculate the square root of the right side: 1.256623079

Break this problem into two subproblems by setting 
(x + 0.71875) equal to 1.256623079 and -1.256623079.

Subproblem 1

x + 0.71875 = 1.256623079 Simplifying x + 0.71875 = 1.256623079 Reorder the terms: 0.71875 + x = 1.256623079 Solving 0.71875 + x = 1.256623079 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.71875' to each side of the equation. 0.71875 + -0.71875 + x = 1.256623079 + -0.71875 Combine like terms: 0.71875 + -0.71875 = 0.00000 0.00000 + x = 1.256623079 + -0.71875 x = 1.256623079 + -0.71875 Combine like terms: 1.256623079 + -0.71875 = 0.537873079 x = 0.537873079 Simplifying x = 0.537873079

Subproblem 2

x + 0.71875 = -1.256623079 Simplifying x + 0.71875 = -1.256623079 Reorder the terms: 0.71875 + x = -1.256623079 Solving 0.71875 + x = -1.256623079 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.71875' to each side of the equation. 0.71875 + -0.71875 + x = -1.256623079 + -0.71875 Combine like terms: 0.71875 + -0.71875 = 0.00000 0.00000 + x = -1.256623079 + -0.71875 x = -1.256623079 + -0.71875 Combine like terms: -1.256623079 + -0.71875 = -1.975373079 x = -1.975373079 Simplifying x = -1.975373079

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.537873079, -1.975373079}

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