t^2-7t-17=0

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Solution for t^2-7t-17=0 equation:


Simplifying
t2 + -7t + -17 = 0

Reorder the terms:
-17 + -7t + t2 = 0

Solving
-17 + -7t + t2 = 0

Solving for variable 't'.

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -7t + 17 + t2 = 0 + 17

Reorder the terms:
-17 + 17 + -7t + t2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -7t + t2 = 0 + 17
-7t + t2 = 0 + 17

Combine like terms: 0 + 17 = 17
-7t + t2 = 17

The t term is -7t.  Take half its coefficient (-3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
-7t + 12.25 + t2 = 17 + 12.25

Reorder the terms:
12.25 + -7t + t2 = 17 + 12.25

Combine like terms: 17 + 12.25 = 29.25
12.25 + -7t + t2 = 29.25

Factor a perfect square on the left side:
(t + -3.5)(t + -3.5) = 29.25

Calculate the square root of the right side: 5.408326913

Break this problem into two subproblems by setting 
(t + -3.5) equal to 5.408326913 and -5.408326913.

Subproblem 1

t + -3.5 = 5.408326913 Simplifying t + -3.5 = 5.408326913 Reorder the terms: -3.5 + t = 5.408326913 Solving -3.5 + t = 5.408326913 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = 5.408326913 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = 5.408326913 + 3.5 t = 5.408326913 + 3.5 Combine like terms: 5.408326913 + 3.5 = 8.908326913 t = 8.908326913 Simplifying t = 8.908326913

Subproblem 2

t + -3.5 = -5.408326913 Simplifying t + -3.5 = -5.408326913 Reorder the terms: -3.5 + t = -5.408326913 Solving -3.5 + t = -5.408326913 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.5' to each side of the equation. -3.5 + 3.5 + t = -5.408326913 + 3.5 Combine like terms: -3.5 + 3.5 = 0.0 0.0 + t = -5.408326913 + 3.5 t = -5.408326913 + 3.5 Combine like terms: -5.408326913 + 3.5 = -1.908326913 t = -1.908326913 Simplifying t = -1.908326913

Solution

The solution to the problem is based on the solutions from the subproblems. t = {8.908326913, -1.908326913}

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