16x^2+17x+5=9

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Solution for 16x^2+17x+5=9 equation:


Simplifying
16x2 + 17x + 5 = 9

Reorder the terms:
5 + 17x + 16x2 = 9

Solving
5 + 17x + 16x2 = 9

Solving for variable 'x'.

Reorder the terms:
5 + -9 + 17x + 16x2 = 9 + -9

Combine like terms: 5 + -9 = -4
-4 + 17x + 16x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-4 + 17x + 16x2 = 0

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

Divide each side by '16'.
-0.25 + 1.0625x + x2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + 1.0625x + 0.25 + x2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + 1.0625x + x2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + 1.0625x + x2 = 0 + 0.25
1.0625x + x2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
1.0625x + x2 = 0.25

The x term is 1.0625x.  Take half its coefficient (0.53125).
Square it (0.2822265625) and add it to both sides.

Add '0.2822265625' to each side of the equation.
1.0625x + 0.2822265625 + x2 = 0.25 + 0.2822265625

Reorder the terms:
0.2822265625 + 1.0625x + x2 = 0.25 + 0.2822265625

Combine like terms: 0.25 + 0.2822265625 = 0.5322265625
0.2822265625 + 1.0625x + x2 = 0.5322265625

Factor a perfect square on the left side:
(x + 0.53125)(x + 0.53125) = 0.5322265625

Calculate the square root of the right side: 0.729538596

Break this problem into two subproblems by setting 
(x + 0.53125) equal to 0.729538596 and -0.729538596.

Subproblem 1

x + 0.53125 = 0.729538596 Simplifying x + 0.53125 = 0.729538596 Reorder the terms: 0.53125 + x = 0.729538596 Solving 0.53125 + x = 0.729538596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.53125' to each side of the equation. 0.53125 + -0.53125 + x = 0.729538596 + -0.53125 Combine like terms: 0.53125 + -0.53125 = 0.00000 0.00000 + x = 0.729538596 + -0.53125 x = 0.729538596 + -0.53125 Combine like terms: 0.729538596 + -0.53125 = 0.198288596 x = 0.198288596 Simplifying x = 0.198288596

Subproblem 2

x + 0.53125 = -0.729538596 Simplifying x + 0.53125 = -0.729538596 Reorder the terms: 0.53125 + x = -0.729538596 Solving 0.53125 + x = -0.729538596 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.53125' to each side of the equation. 0.53125 + -0.53125 + x = -0.729538596 + -0.53125 Combine like terms: 0.53125 + -0.53125 = 0.00000 0.00000 + x = -0.729538596 + -0.53125 x = -0.729538596 + -0.53125 Combine like terms: -0.729538596 + -0.53125 = -1.260788596 x = -1.260788596 Simplifying x = -1.260788596

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.198288596, -1.260788596}

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