3+2+8t=t^2-3t-12

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Solution for 3+2+8t=t^2-3t-12 equation:


Simplifying
3 + 2 + 8t = t2 + -3t + -12

Combine like terms: 3 + 2 = 5
5 + 8t = t2 + -3t + -12

Reorder the terms:
5 + 8t = -12 + -3t + t2

Solving
5 + 8t = -12 + -3t + t2

Solving for variable 't'.

Reorder the terms:
5 + 12 + 8t + 3t + -1t2 = -12 + -3t + t2 + 12 + 3t + -1t2

Combine like terms: 5 + 12 = 17
17 + 8t + 3t + -1t2 = -12 + -3t + t2 + 12 + 3t + -1t2

Combine like terms: 8t + 3t = 11t
17 + 11t + -1t2 = -12 + -3t + t2 + 12 + 3t + -1t2

Reorder the terms:
17 + 11t + -1t2 = -12 + 12 + -3t + 3t + t2 + -1t2

Combine like terms: -12 + 12 = 0
17 + 11t + -1t2 = 0 + -3t + 3t + t2 + -1t2
17 + 11t + -1t2 = -3t + 3t + t2 + -1t2

Combine like terms: -3t + 3t = 0
17 + 11t + -1t2 = 0 + t2 + -1t2
17 + 11t + -1t2 = t2 + -1t2

Combine like terms: t2 + -1t2 = 0
17 + 11t + -1t2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-17 + -11t + t2 = 0

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -11t + 17 + t2 = 0 + 17

Reorder the terms:
-17 + 17 + -11t + t2 = 0 + 17

Combine like terms: -17 + 17 = 0
0 + -11t + t2 = 0 + 17
-11t + t2 = 0 + 17

Combine like terms: 0 + 17 = 17
-11t + t2 = 17

The t term is -11t.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11t + 30.25 + t2 = 17 + 30.25

Reorder the terms:
30.25 + -11t + t2 = 17 + 30.25

Combine like terms: 17 + 30.25 = 47.25
30.25 + -11t + t2 = 47.25

Factor a perfect square on the left side:
(t + -5.5)(t + -5.5) = 47.25

Calculate the square root of the right side: 6.873863542

Break this problem into two subproblems by setting 
(t + -5.5) equal to 6.873863542 and -6.873863542.

Subproblem 1

t + -5.5 = 6.873863542 Simplifying t + -5.5 = 6.873863542 Reorder the terms: -5.5 + t = 6.873863542 Solving -5.5 + t = 6.873863542 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + t = 6.873863542 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + t = 6.873863542 + 5.5 t = 6.873863542 + 5.5 Combine like terms: 6.873863542 + 5.5 = 12.373863542 t = 12.373863542 Simplifying t = 12.373863542

Subproblem 2

t + -5.5 = -6.873863542 Simplifying t + -5.5 = -6.873863542 Reorder the terms: -5.5 + t = -6.873863542 Solving -5.5 + t = -6.873863542 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + t = -6.873863542 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + t = -6.873863542 + 5.5 t = -6.873863542 + 5.5 Combine like terms: -6.873863542 + 5.5 = -1.373863542 t = -1.373863542 Simplifying t = -1.373863542

Solution

The solution to the problem is based on the solutions from the subproblems. t = {12.373863542, -1.373863542}

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