-2t(t-3)+8t=9t-8

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Solution for -2t(t-3)+8t=9t-8 equation:


Simplifying
-2t(t + -3) + 8t = 9t + -8

Reorder the terms:
-2t(-3 + t) + 8t = 9t + -8
(-3 * -2t + t * -2t) + 8t = 9t + -8
(6t + -2t2) + 8t = 9t + -8

Reorder the terms:
6t + 8t + -2t2 = 9t + -8

Combine like terms: 6t + 8t = 14t
14t + -2t2 = 9t + -8

Reorder the terms:
14t + -2t2 = -8 + 9t

Solving
14t + -2t2 = -8 + 9t

Solving for variable 't'.

Reorder the terms:
8 + 14t + -9t + -2t2 = -8 + 9t + 8 + -9t

Combine like terms: 14t + -9t = 5t
8 + 5t + -2t2 = -8 + 9t + 8 + -9t

Reorder the terms:
8 + 5t + -2t2 = -8 + 8 + 9t + -9t

Combine like terms: -8 + 8 = 0
8 + 5t + -2t2 = 0 + 9t + -9t
8 + 5t + -2t2 = 9t + -9t

Combine like terms: 9t + -9t = 0
8 + 5t + -2t2 = 0

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

Divide each side by '-2'.
-4 + -2.5t + t2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + -2.5t + 4 + t2 = 0 + 4

Reorder the terms:
-4 + 4 + -2.5t + t2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -2.5t + t2 = 0 + 4
-2.5t + t2 = 0 + 4

Combine like terms: 0 + 4 = 4
-2.5t + t2 = 4

The t term is -2.5t.  Take half its coefficient (-1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
-2.5t + 1.5625 + t2 = 4 + 1.5625

Reorder the terms:
1.5625 + -2.5t + t2 = 4 + 1.5625

Combine like terms: 4 + 1.5625 = 5.5625
1.5625 + -2.5t + t2 = 5.5625

Factor a perfect square on the left side:
(t + -1.25)(t + -1.25) = 5.5625

Calculate the square root of the right side: 2.358495283

Break this problem into two subproblems by setting 
(t + -1.25) equal to 2.358495283 and -2.358495283.

Subproblem 1

t + -1.25 = 2.358495283 Simplifying t + -1.25 = 2.358495283 Reorder the terms: -1.25 + t = 2.358495283 Solving -1.25 + t = 2.358495283 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = 2.358495283 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = 2.358495283 + 1.25 t = 2.358495283 + 1.25 Combine like terms: 2.358495283 + 1.25 = 3.608495283 t = 3.608495283 Simplifying t = 3.608495283

Subproblem 2

t + -1.25 = -2.358495283 Simplifying t + -1.25 = -2.358495283 Reorder the terms: -1.25 + t = -2.358495283 Solving -1.25 + t = -2.358495283 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.25' to each side of the equation. -1.25 + 1.25 + t = -2.358495283 + 1.25 Combine like terms: -1.25 + 1.25 = 0.00 0.00 + t = -2.358495283 + 1.25 t = -2.358495283 + 1.25 Combine like terms: -2.358495283 + 1.25 = -1.108495283 t = -1.108495283 Simplifying t = -1.108495283

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.608495283, -1.108495283}

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