16t^2-17t-217=0

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Solution for 16t^2-17t-217=0 equation:


Simplifying
16t2 + -17t + -217 = 0

Reorder the terms:
-217 + -17t + 16t2 = 0

Solving
-217 + -17t + 16t2 = 0

Solving for variable 't'.

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

Divide each side by '16'.
-13.5625 + -1.0625t + t2 = 0

Move the constant term to the right:

Add '13.5625' to each side of the equation.
-13.5625 + -1.0625t + 13.5625 + t2 = 0 + 13.5625

Reorder the terms:
-13.5625 + 13.5625 + -1.0625t + t2 = 0 + 13.5625

Combine like terms: -13.5625 + 13.5625 = 0.0000
0.0000 + -1.0625t + t2 = 0 + 13.5625
-1.0625t + t2 = 0 + 13.5625

Combine like terms: 0 + 13.5625 = 13.5625
-1.0625t + t2 = 13.5625

The t term is -1.0625t.  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.
-1.0625t + 0.2822265625 + t2 = 13.5625 + 0.2822265625

Reorder the terms:
0.2822265625 + -1.0625t + t2 = 13.5625 + 0.2822265625

Combine like terms: 13.5625 + 0.2822265625 = 13.8447265625
0.2822265625 + -1.0625t + t2 = 13.8447265625

Factor a perfect square on the left side:
(t + -0.53125)(t + -0.53125) = 13.8447265625

Calculate the square root of the right side: 3.720850247

Break this problem into two subproblems by setting 
(t + -0.53125) equal to 3.720850247 and -3.720850247.

Subproblem 1

t + -0.53125 = 3.720850247 Simplifying t + -0.53125 = 3.720850247 Reorder the terms: -0.53125 + t = 3.720850247 Solving -0.53125 + t = 3.720850247 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.53125' to each side of the equation. -0.53125 + 0.53125 + t = 3.720850247 + 0.53125 Combine like terms: -0.53125 + 0.53125 = 0.00000 0.00000 + t = 3.720850247 + 0.53125 t = 3.720850247 + 0.53125 Combine like terms: 3.720850247 + 0.53125 = 4.252100247 t = 4.252100247 Simplifying t = 4.252100247

Subproblem 2

t + -0.53125 = -3.720850247 Simplifying t + -0.53125 = -3.720850247 Reorder the terms: -0.53125 + t = -3.720850247 Solving -0.53125 + t = -3.720850247 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '0.53125' to each side of the equation. -0.53125 + 0.53125 + t = -3.720850247 + 0.53125 Combine like terms: -0.53125 + 0.53125 = 0.00000 0.00000 + t = -3.720850247 + 0.53125 t = -3.720850247 + 0.53125 Combine like terms: -3.720850247 + 0.53125 = -3.189600247 t = -3.189600247 Simplifying t = -3.189600247

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.252100247, -3.189600247}

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