-4t^2+9t-4=0

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Solution for -4t^2+9t-4=0 equation:


Simplifying
-4t2 + 9t + -4 = 0

Reorder the terms:
-4 + 9t + -4t2 = 0

Solving
-4 + 9t + -4t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
1 + -2.25t + t2 = 0

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + -2.25t + -1 + t2 = 0 + -1

Reorder the terms:
1 + -1 + -2.25t + t2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2.25t + t2 = 0 + -1
-2.25t + t2 = 0 + -1

Combine like terms: 0 + -1 = -1
-2.25t + t2 = -1

The t term is -2.25t.  Take half its coefficient (-1.125).
Square it (1.265625) and add it to both sides.

Add '1.265625' to each side of the equation.
-2.25t + 1.265625 + t2 = -1 + 1.265625

Reorder the terms:
1.265625 + -2.25t + t2 = -1 + 1.265625

Combine like terms: -1 + 1.265625 = 0.265625
1.265625 + -2.25t + t2 = 0.265625

Factor a perfect square on the left side:
(t + -1.125)(t + -1.125) = 0.265625

Calculate the square root of the right side: 0.515388203

Break this problem into two subproblems by setting 
(t + -1.125) equal to 0.515388203 and -0.515388203.

Subproblem 1

t + -1.125 = 0.515388203 Simplifying t + -1.125 = 0.515388203 Reorder the terms: -1.125 + t = 0.515388203 Solving -1.125 + t = 0.515388203 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + t = 0.515388203 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + t = 0.515388203 + 1.125 t = 0.515388203 + 1.125 Combine like terms: 0.515388203 + 1.125 = 1.640388203 t = 1.640388203 Simplifying t = 1.640388203

Subproblem 2

t + -1.125 = -0.515388203 Simplifying t + -1.125 = -0.515388203 Reorder the terms: -1.125 + t = -0.515388203 Solving -1.125 + t = -0.515388203 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.125' to each side of the equation. -1.125 + 1.125 + t = -0.515388203 + 1.125 Combine like terms: -1.125 + 1.125 = 0.000 0.000 + t = -0.515388203 + 1.125 t = -0.515388203 + 1.125 Combine like terms: -0.515388203 + 1.125 = 0.609611797 t = 0.609611797 Simplifying t = 0.609611797

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.640388203, 0.609611797}

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