-t^2+6t+13=0

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Solution for -t^2+6t+13=0 equation:


Simplifying
-1t2 + 6t + 13 = 0

Reorder the terms:
13 + 6t + -1t2 = 0

Solving
13 + 6t + -1t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-13 + -6t + t2 = 0

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + -6t + 13 + t2 = 0 + 13

Reorder the terms:
-13 + 13 + -6t + t2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + -6t + t2 = 0 + 13
-6t + t2 = 0 + 13

Combine like terms: 0 + 13 = 13
-6t + t2 = 13

The t term is -6t.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6t + 9 + t2 = 13 + 9

Reorder the terms:
9 + -6t + t2 = 13 + 9

Combine like terms: 13 + 9 = 22
9 + -6t + t2 = 22

Factor a perfect square on the left side:
(t + -3)(t + -3) = 22

Calculate the square root of the right side: 4.69041576

Break this problem into two subproblems by setting 
(t + -3) equal to 4.69041576 and -4.69041576.

Subproblem 1

t + -3 = 4.69041576 Simplifying t + -3 = 4.69041576 Reorder the terms: -3 + t = 4.69041576 Solving -3 + t = 4.69041576 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = 4.69041576 + 3 Combine like terms: -3 + 3 = 0 0 + t = 4.69041576 + 3 t = 4.69041576 + 3 Combine like terms: 4.69041576 + 3 = 7.69041576 t = 7.69041576 Simplifying t = 7.69041576

Subproblem 2

t + -3 = -4.69041576 Simplifying t + -3 = -4.69041576 Reorder the terms: -3 + t = -4.69041576 Solving -3 + t = -4.69041576 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + t = -4.69041576 + 3 Combine like terms: -3 + 3 = 0 0 + t = -4.69041576 + 3 t = -4.69041576 + 3 Combine like terms: -4.69041576 + 3 = -1.69041576 t = -1.69041576 Simplifying t = -1.69041576

Solution

The solution to the problem is based on the solutions from the subproblems. t = {7.69041576, -1.69041576}

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