(2t^2-19t-18)-(-8t^2+12t-12)=

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Solution for (2t^2-19t-18)-(-8t^2+12t-12)= equation:


Simplifying
(2t2 + -19t + -18) + -1(-8t2 + 12t + -12) = 0

Reorder the terms:
(-18 + -19t + 2t2) + -1(-8t2 + 12t + -12) = 0

Remove parenthesis around (-18 + -19t + 2t2)
-18 + -19t + 2t2 + -1(-8t2 + 12t + -12) = 0

Reorder the terms:
-18 + -19t + 2t2 + -1(-12 + 12t + -8t2) = 0
-18 + -19t + 2t2 + (-12 * -1 + 12t * -1 + -8t2 * -1) = 0
-18 + -19t + 2t2 + (12 + -12t + 8t2) = 0

Reorder the terms:
-18 + 12 + -19t + -12t + 2t2 + 8t2 = 0

Combine like terms: -18 + 12 = -6
-6 + -19t + -12t + 2t2 + 8t2 = 0

Combine like terms: -19t + -12t = -31t
-6 + -31t + 2t2 + 8t2 = 0

Combine like terms: 2t2 + 8t2 = 10t2
-6 + -31t + 10t2 = 0

Solving
-6 + -31t + 10t2 = 0

Solving for variable 't'.

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

Divide each side by '10'.
-0.6 + -3.1t + t2 = 0.0

Move the constant term to the right:

Add '0.6' to each side of the equation.
-0.6 + -3.1t + 0.6 + t2 = 0.0 + 0.6

Reorder the terms:
-0.6 + 0.6 + -3.1t + t2 = 0.0 + 0.6

Combine like terms: -0.6 + 0.6 = 0.0
0.0 + -3.1t + t2 = 0.0 + 0.6
-3.1t + t2 = 0.0 + 0.6

Combine like terms: 0.0 + 0.6 = 0.6
-3.1t + t2 = 0.6

The t term is -3.1t.  Take half its coefficient (-1.55).
Square it (2.4025) and add it to both sides.

Add '2.4025' to each side of the equation.
-3.1t + 2.4025 + t2 = 0.6 + 2.4025

Reorder the terms:
2.4025 + -3.1t + t2 = 0.6 + 2.4025

Combine like terms: 0.6 + 2.4025 = 3.0025
2.4025 + -3.1t + t2 = 3.0025

Factor a perfect square on the left side:
(t + -1.55)(t + -1.55) = 3.0025

Calculate the square root of the right side: 1.732772345

Break this problem into two subproblems by setting 
(t + -1.55) equal to 1.732772345 and -1.732772345.

Subproblem 1

t + -1.55 = 1.732772345 Simplifying t + -1.55 = 1.732772345 Reorder the terms: -1.55 + t = 1.732772345 Solving -1.55 + t = 1.732772345 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.55' to each side of the equation. -1.55 + 1.55 + t = 1.732772345 + 1.55 Combine like terms: -1.55 + 1.55 = 0.00 0.00 + t = 1.732772345 + 1.55 t = 1.732772345 + 1.55 Combine like terms: 1.732772345 + 1.55 = 3.282772345 t = 3.282772345 Simplifying t = 3.282772345

Subproblem 2

t + -1.55 = -1.732772345 Simplifying t + -1.55 = -1.732772345 Reorder the terms: -1.55 + t = -1.732772345 Solving -1.55 + t = -1.732772345 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.55' to each side of the equation. -1.55 + 1.55 + t = -1.732772345 + 1.55 Combine like terms: -1.55 + 1.55 = 0.00 0.00 + t = -1.732772345 + 1.55 t = -1.732772345 + 1.55 Combine like terms: -1.732772345 + 1.55 = -0.182772345 t = -0.182772345 Simplifying t = -0.182772345

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.282772345, -0.182772345}

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