-5t^2+11t+54=0

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Solution for -5t^2+11t+54=0 equation:


Simplifying
-5t2 + 11t + 54 = 0

Reorder the terms:
54 + 11t + -5t2 = 0

Solving
54 + 11t + -5t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-10.8 + -2.2t + t2 = 0

Move the constant term to the right:

Add '10.8' to each side of the equation.
-10.8 + -2.2t + 10.8 + t2 = 0 + 10.8

Reorder the terms:
-10.8 + 10.8 + -2.2t + t2 = 0 + 10.8

Combine like terms: -10.8 + 10.8 = 0.0
0.0 + -2.2t + t2 = 0 + 10.8
-2.2t + t2 = 0 + 10.8

Combine like terms: 0 + 10.8 = 10.8
-2.2t + t2 = 10.8

The t term is -2.2t.  Take half its coefficient (-1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
-2.2t + 1.21 + t2 = 10.8 + 1.21

Reorder the terms:
1.21 + -2.2t + t2 = 10.8 + 1.21

Combine like terms: 10.8 + 1.21 = 12.01
1.21 + -2.2t + t2 = 12.01

Factor a perfect square on the left side:
(t + -1.1)(t + -1.1) = 12.01

Calculate the square root of the right side: 3.46554469

Break this problem into two subproblems by setting 
(t + -1.1) equal to 3.46554469 and -3.46554469.

Subproblem 1

t + -1.1 = 3.46554469 Simplifying t + -1.1 = 3.46554469 Reorder the terms: -1.1 + t = 3.46554469 Solving -1.1 + t = 3.46554469 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + t = 3.46554469 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + t = 3.46554469 + 1.1 t = 3.46554469 + 1.1 Combine like terms: 3.46554469 + 1.1 = 4.56554469 t = 4.56554469 Simplifying t = 4.56554469

Subproblem 2

t + -1.1 = -3.46554469 Simplifying t + -1.1 = -3.46554469 Reorder the terms: -1.1 + t = -3.46554469 Solving -1.1 + t = -3.46554469 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + t = -3.46554469 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + t = -3.46554469 + 1.1 t = -3.46554469 + 1.1 Combine like terms: -3.46554469 + 1.1 = -2.36554469 t = -2.36554469 Simplifying t = -2.36554469

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.56554469, -2.36554469}

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