9t^2-22t+9=0

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Solution for 9t^2-22t+9=0 equation:


Simplifying
9t2 + -22t + 9 = 0

Reorder the terms:
9 + -22t + 9t2 = 0

Solving
9 + -22t + 9t2 = 0

Solving for variable 't'.

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

Divide each side by '9'.
1 + -2.444444444t + t2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.444444444t + -1 + t2 = 0 + -1

Reorder the terms:
1 + -1 + -2.444444444t + t2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.444444444t + t2 = 0 + -1
-2.444444444t + t2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.444444444t + t2 = -1

The t term is -2.444444444t.  Take half its coefficient (-1.222222222).
Square it (1.493827160) and add it to both sides.

Add '1.493827160' to each side of the equation.
-2.444444444t + 1.493827160 + t2 = -1 + 1.493827160

Reorder the terms:
1.493827160 + -2.444444444t + t2 = -1 + 1.493827160

Combine like terms: -1 + 1.493827160 = 0.49382716
1.493827160 + -2.444444444t + t2 = 0.49382716

Factor a perfect square on the left side:
(t + -1.222222222)(t + -1.222222222) = 0.49382716

Calculate the square root of the right side: 0.702728369

Break this problem into two subproblems by setting 
(t + -1.222222222) equal to 0.702728369 and -0.702728369.

Subproblem 1

t + -1.222222222 = 0.702728369 Simplifying t + -1.222222222 = 0.702728369 Reorder the terms: -1.222222222 + t = 0.702728369 Solving -1.222222222 + t = 0.702728369 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.222222222' to each side of the equation. -1.222222222 + 1.222222222 + t = 0.702728369 + 1.222222222 Combine like terms: -1.222222222 + 1.222222222 = 0.000000000 0.000000000 + t = 0.702728369 + 1.222222222 t = 0.702728369 + 1.222222222 Combine like terms: 0.702728369 + 1.222222222 = 1.924950591 t = 1.924950591 Simplifying t = 1.924950591

Subproblem 2

t + -1.222222222 = -0.702728369 Simplifying t + -1.222222222 = -0.702728369 Reorder the terms: -1.222222222 + t = -0.702728369 Solving -1.222222222 + t = -0.702728369 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.222222222' to each side of the equation. -1.222222222 + 1.222222222 + t = -0.702728369 + 1.222222222 Combine like terms: -1.222222222 + 1.222222222 = 0.000000000 0.000000000 + t = -0.702728369 + 1.222222222 t = -0.702728369 + 1.222222222 Combine like terms: -0.702728369 + 1.222222222 = 0.519493853 t = 0.519493853 Simplifying t = 0.519493853

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.924950591, 0.519493853}

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