(t+3)(t-4)=5

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Solution for (t+3)(t-4)=5 equation:


Simplifying
(t + 3)(t + -4) = 5

Reorder the terms:
(3 + t)(t + -4) = 5

Reorder the terms:
(3 + t)(-4 + t) = 5

Multiply (3 + t) * (-4 + t)
(3(-4 + t) + t(-4 + t)) = 5
((-4 * 3 + t * 3) + t(-4 + t)) = 5
((-12 + 3t) + t(-4 + t)) = 5
(-12 + 3t + (-4 * t + t * t)) = 5
(-12 + 3t + (-4t + t2)) = 5

Combine like terms: 3t + -4t = -1t
(-12 + -1t + t2) = 5

Solving
-12 + -1t + t2 = 5

Solving for variable 't'.

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

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

Combine like terms: 5 + -5 = 0
-17 + -1t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '17' to each side of the equation.
-17 + -1t + 17 + t2 = 0 + 17

Reorder the terms:
-17 + 17 + -1t + t2 = 0 + 17

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

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

The t term is -1t.  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 = 17 + 0.25

Reorder the terms:
0.25 + -1t + t2 = 17 + 0.25

Combine like terms: 17 + 0.25 = 17.25
0.25 + -1t + t2 = 17.25

Factor a perfect square on the left side:
(t + -0.5)(t + -0.5) = 17.25

Calculate the square root of the right side: 4.153311931

Break this problem into two subproblems by setting 
(t + -0.5) equal to 4.153311931 and -4.153311931.

Subproblem 1

t + -0.5 = 4.153311931 Simplifying t + -0.5 = 4.153311931 Reorder the terms: -0.5 + t = 4.153311931 Solving -0.5 + t = 4.153311931 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 = 4.153311931 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = 4.153311931 + 0.5 t = 4.153311931 + 0.5 Combine like terms: 4.153311931 + 0.5 = 4.653311931 t = 4.653311931 Simplifying t = 4.653311931

Subproblem 2

t + -0.5 = -4.153311931 Simplifying t + -0.5 = -4.153311931 Reorder the terms: -0.5 + t = -4.153311931 Solving -0.5 + t = -4.153311931 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 = -4.153311931 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + t = -4.153311931 + 0.5 t = -4.153311931 + 0.5 Combine like terms: -4.153311931 + 0.5 = -3.653311931 t = -3.653311931 Simplifying t = -3.653311931

Solution

The solution to the problem is based on the solutions from the subproblems. t = {4.653311931, -3.653311931}

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