2t^2+11t=8

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Solution for 2t^2+11t=8 equation:


Simplifying
2t2 + 11t = 8

Reorder the terms:
11t + 2t2 = 8

Solving
11t + 2t2 = 8

Solving for variable 't'.

Reorder the terms:
-8 + 11t + 2t2 = 8 + -8

Combine like terms: 8 + -8 = 0
-8 + 11t + 2t2 = 0

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

Divide each side by '2'.
-4 + 5.5t + t2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 5.5t + 4 + t2 = 0 + 4

Reorder the terms:
-4 + 4 + 5.5t + t2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 5.5t + t2 = 0 + 4
5.5t + t2 = 0 + 4

Combine like terms: 0 + 4 = 4
5.5t + t2 = 4

The t term is 5.5t.  Take half its coefficient (2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
5.5t + 7.5625 + t2 = 4 + 7.5625

Reorder the terms:
7.5625 + 5.5t + t2 = 4 + 7.5625

Combine like terms: 4 + 7.5625 = 11.5625
7.5625 + 5.5t + t2 = 11.5625

Factor a perfect square on the left side:
(t + 2.75)(t + 2.75) = 11.5625

Calculate the square root of the right side: 3.400367627

Break this problem into two subproblems by setting 
(t + 2.75) equal to 3.400367627 and -3.400367627.

Subproblem 1

t + 2.75 = 3.400367627 Simplifying t + 2.75 = 3.400367627 Reorder the terms: 2.75 + t = 3.400367627 Solving 2.75 + t = 3.400367627 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + t = 3.400367627 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + t = 3.400367627 + -2.75 t = 3.400367627 + -2.75 Combine like terms: 3.400367627 + -2.75 = 0.650367627 t = 0.650367627 Simplifying t = 0.650367627

Subproblem 2

t + 2.75 = -3.400367627 Simplifying t + 2.75 = -3.400367627 Reorder the terms: 2.75 + t = -3.400367627 Solving 2.75 + t = -3.400367627 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-2.75' to each side of the equation. 2.75 + -2.75 + t = -3.400367627 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + t = -3.400367627 + -2.75 t = -3.400367627 + -2.75 Combine like terms: -3.400367627 + -2.75 = -6.150367627 t = -6.150367627 Simplifying t = -6.150367627

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.650367627, -6.150367627}

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