4t^2+8t+4=19

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Solution for 4t^2+8t+4=19 equation:


Simplifying
4t2 + 8t + 4 = 19

Reorder the terms:
4 + 8t + 4t2 = 19

Solving
4 + 8t + 4t2 = 19

Solving for variable 't'.

Reorder the terms:
4 + -19 + 8t + 4t2 = 19 + -19

Combine like terms: 4 + -19 = -15
-15 + 8t + 4t2 = 19 + -19

Combine like terms: 19 + -19 = 0
-15 + 8t + 4t2 = 0

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

Divide each side by '4'.
-3.75 + 2t + t2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + 2t + 3.75 + t2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + 2t + t2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + 2t + t2 = 0 + 3.75
2t + t2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
2t + t2 = 3.75

The t term is 2t.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2t + 1 + t2 = 3.75 + 1

Reorder the terms:
1 + 2t + t2 = 3.75 + 1

Combine like terms: 3.75 + 1 = 4.75
1 + 2t + t2 = 4.75

Factor a perfect square on the left side:
(t + 1)(t + 1) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(t + 1) equal to 2.179449472 and -2.179449472.

Subproblem 1

t + 1 = 2.179449472 Simplifying t + 1 = 2.179449472 Reorder the terms: 1 + t = 2.179449472 Solving 1 + t = 2.179449472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = 2.179449472 + -1 Combine like terms: 1 + -1 = 0 0 + t = 2.179449472 + -1 t = 2.179449472 + -1 Combine like terms: 2.179449472 + -1 = 1.179449472 t = 1.179449472 Simplifying t = 1.179449472

Subproblem 2

t + 1 = -2.179449472 Simplifying t + 1 = -2.179449472 Reorder the terms: 1 + t = -2.179449472 Solving 1 + t = -2.179449472 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + t = -2.179449472 + -1 Combine like terms: 1 + -1 = 0 0 + t = -2.179449472 + -1 t = -2.179449472 + -1 Combine like terms: -2.179449472 + -1 = -3.179449472 t = -3.179449472 Simplifying t = -3.179449472

Solution

The solution to the problem is based on the solutions from the subproblems. t = {1.179449472, -3.179449472}

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