(2t^2+3t-4)+(8t+1)=0

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Solution for (2t^2+3t-4)+(8t+1)=0 equation:


Simplifying
(2t2 + 3t + -4) + (8t + 1) = 0

Reorder the terms:
(-4 + 3t + 2t2) + (8t + 1) = 0

Remove parenthesis around (-4 + 3t + 2t2)
-4 + 3t + 2t2 + (8t + 1) = 0

Reorder the terms:
-4 + 3t + 2t2 + (1 + 8t) = 0

Remove parenthesis around (1 + 8t)
-4 + 3t + 2t2 + 1 + 8t = 0

Reorder the terms:
-4 + 1 + 3t + 8t + 2t2 = 0

Combine like terms: -4 + 1 = -3
-3 + 3t + 8t + 2t2 = 0

Combine like terms: 3t + 8t = 11t
-3 + 11t + 2t2 = 0

Solving
-3 + 11t + 2t2 = 0

Solving for variable 't'.

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

Divide each side by '2'.
-1.5 + 5.5t + t2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 5.5t + 1.5 + t2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 5.5t + t2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 5.5t + t2 = 0 + 1.5
5.5t + t2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
5.5t + t2 = 1.5

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 = 1.5 + 7.5625

Reorder the terms:
7.5625 + 5.5t + t2 = 1.5 + 7.5625

Combine like terms: 1.5 + 7.5625 = 9.0625
7.5625 + 5.5t + t2 = 9.0625

Factor a perfect square on the left side:
(t + 2.75)(t + 2.75) = 9.0625

Calculate the square root of the right side: 3.010398645

Break this problem into two subproblems by setting 
(t + 2.75) equal to 3.010398645 and -3.010398645.

Subproblem 1

t + 2.75 = 3.010398645 Simplifying t + 2.75 = 3.010398645 Reorder the terms: 2.75 + t = 3.010398645 Solving 2.75 + t = 3.010398645 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 = 3.010398645 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + t = 3.010398645 + -2.75 t = 3.010398645 + -2.75 Combine like terms: 3.010398645 + -2.75 = 0.260398645 t = 0.260398645 Simplifying t = 0.260398645

Subproblem 2

t + 2.75 = -3.010398645 Simplifying t + 2.75 = -3.010398645 Reorder the terms: 2.75 + t = -3.010398645 Solving 2.75 + t = -3.010398645 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 = -3.010398645 + -2.75 Combine like terms: 2.75 + -2.75 = 0.00 0.00 + t = -3.010398645 + -2.75 t = -3.010398645 + -2.75 Combine like terms: -3.010398645 + -2.75 = -5.760398645 t = -5.760398645 Simplifying t = -5.760398645

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.260398645, -5.760398645}

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