12=t^2-t-12

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Solution for 12=t^2-t-12 equation:


Simplifying
12 = t2 + -1t + -12

Reorder the terms:
12 = -12 + -1t + t2

Solving
12 = -12 + -1t + t2

Solving for variable 't'.

Combine like terms: 12 + 12 = 24
24 + t + -1t2 = -12 + -1t + t2 + 12 + t + -1t2

Reorder the terms:
24 + t + -1t2 = -12 + 12 + -1t + t + t2 + -1t2

Combine like terms: -12 + 12 = 0
24 + t + -1t2 = 0 + -1t + t + t2 + -1t2
24 + t + -1t2 = -1t + t + t2 + -1t2

Combine like terms: -1t + t = 0
24 + t + -1t2 = 0 + t2 + -1t2
24 + t + -1t2 = t2 + -1t2

Combine like terms: t2 + -1t2 = 0
24 + t + -1t2 = 0

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

Divide each side by '-1'.
-24 + -1t + t2 = 0

Move the constant term to the right:

Add '24' to each side of the equation.
-24 + -1t + 24 + t2 = 0 + 24

Reorder the terms:
-24 + 24 + -1t + t2 = 0 + 24

Combine like terms: -24 + 24 = 0
0 + -1t + t2 = 0 + 24
-1t + t2 = 0 + 24

Combine like terms: 0 + 24 = 24
-1t + t2 = 24

The t term is t.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1t + 0.25 + t2 = 24 + 0.25

Reorder the terms:
0.25 + -1t + t2 = 24 + 0.25

Combine like terms: 24 + 0.25 = 24.25
0.25 + -1t + t2 = 24.25

Factor a perfect square on the left side:
(t + 0.5)(t + 0.5) = 24.25

Calculate the square root of the right side: 4.924428901

Break this problem into two subproblems by setting 
(t + 0.5) equal to 4.924428901 and -4.924428901.

Subproblem 1

t + 0.5 = 4.924428901 Simplifying t + 0.5 = 4.924428901 Reorder the terms: 0.5 + t = 4.924428901 Solving 0.5 + t = 4.924428901 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = 4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = 4.924428901 + -0.5 t = 4.924428901 + -0.5 Combine like terms: 4.924428901 + -0.5 = 4.424428901 t = 4.424428901 Simplifying t = 4.424428901

Subproblem 2

t + 0.5 = -4.924428901 Simplifying t + 0.5 = -4.924428901 Reorder the terms: 0.5 + t = -4.924428901 Solving 0.5 + t = -4.924428901 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + t = -4.924428901 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + t = -4.924428901 + -0.5 t = -4.924428901 + -0.5 Combine like terms: -4.924428901 + -0.5 = -5.424428901 t = -5.424428901 Simplifying t = -5.424428901

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.424428901, -5.424428901}

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