(t+8)(t)=12

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Solution for (t+8)(t)=12 equation:


Simplifying
(t + 8)(t) = 12

Reorder the terms:
(8 + t)(t) = 12

Reorder the terms for easier multiplication:
t(8 + t) = 12
(8 * t + t * t) = 12
(8t + t2) = 12

Solving
8t + t2 = 12

Solving for variable 't'.

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

Combine like terms: 12 + -12 = 0
-12 + 8t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '12' to each side of the equation.
-12 + 8t + 12 + t2 = 0 + 12

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

Combine like terms: -12 + 12 = 0
0 + 8t + t2 = 0 + 12
8t + t2 = 0 + 12

Combine like terms: 0 + 12 = 12
8t + t2 = 12

The t term is 8t.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8t + 16 + t2 = 12 + 16

Reorder the terms:
16 + 8t + t2 = 12 + 16

Combine like terms: 12 + 16 = 28
16 + 8t + t2 = 28

Factor a perfect square on the left side:
(t + 4)(t + 4) = 28

Calculate the square root of the right side: 5.291502622

Break this problem into two subproblems by setting 
(t + 4) equal to 5.291502622 and -5.291502622.

Subproblem 1

t + 4 = 5.291502622 Simplifying t + 4 = 5.291502622 Reorder the terms: 4 + t = 5.291502622 Solving 4 + t = 5.291502622 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + t = 5.291502622 + -4 Combine like terms: 4 + -4 = 0 0 + t = 5.291502622 + -4 t = 5.291502622 + -4 Combine like terms: 5.291502622 + -4 = 1.291502622 t = 1.291502622 Simplifying t = 1.291502622

Subproblem 2

t + 4 = -5.291502622 Simplifying t + 4 = -5.291502622 Reorder the terms: 4 + t = -5.291502622 Solving 4 + t = -5.291502622 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + t = -5.291502622 + -4 Combine like terms: 4 + -4 = 0 0 + t = -5.291502622 + -4 t = -5.291502622 + -4 Combine like terms: -5.291502622 + -4 = -9.291502622 t = -9.291502622 Simplifying t = -9.291502622

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.291502622, -9.291502622}

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