t^2-3.2t-3.2=49

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Solution for t^2-3.2t-3.2=49 equation:


Simplifying
t2 + -3.2t + -3.2 = 49

Reorder the terms:
-3.2 + -3.2t + t2 = 49

Solving
-3.2 + -3.2t + t2 = 49

Solving for variable 't'.

Reorder the terms:
-3.2 + -49 + -3.2t + t2 = 49 + -49

Combine like terms: -3.2 + -49 = -52.2
-52.2 + -3.2t + t2 = 49 + -49

Combine like terms: 49 + -49 = 0
-52.2 + -3.2t + t2 = 0

Begin completing the square.

Move the constant term to the right:

Add '52.2' to each side of the equation.
-52.2 + -3.2t + 52.2 + t2 = 0 + 52.2

Reorder the terms:
-52.2 + 52.2 + -3.2t + t2 = 0 + 52.2

Combine like terms: -52.2 + 52.2 = 0.0
0.0 + -3.2t + t2 = 0 + 52.2
-3.2t + t2 = 0 + 52.2

Combine like terms: 0 + 52.2 = 52.2
-3.2t + t2 = 52.2

The t term is -3.2t.  Take half its coefficient (-1.6).
Square it (2.56) and add it to both sides.

Add '2.56' to each side of the equation.
-3.2t + 2.56 + t2 = 52.2 + 2.56

Reorder the terms:
2.56 + -3.2t + t2 = 52.2 + 2.56

Combine like terms: 52.2 + 2.56 = 54.76
2.56 + -3.2t + t2 = 54.76

Factor a perfect square on the left side:
(t + -1.6)(t + -1.6) = 54.76

Calculate the square root of the right side: 7.4

Break this problem into two subproblems by setting 
(t + -1.6) equal to 7.4 and -7.4.

Subproblem 1

t + -1.6 = 7.4 Simplifying t + -1.6 = 7.4 Reorder the terms: -1.6 + t = 7.4 Solving -1.6 + t = 7.4 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + t = 7.4 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + t = 7.4 + 1.6 t = 7.4 + 1.6 Combine like terms: 7.4 + 1.6 = 9 t = 9 Simplifying t = 9

Subproblem 2

t + -1.6 = -7.4 Simplifying t + -1.6 = -7.4 Reorder the terms: -1.6 + t = -7.4 Solving -1.6 + t = -7.4 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '1.6' to each side of the equation. -1.6 + 1.6 + t = -7.4 + 1.6 Combine like terms: -1.6 + 1.6 = 0.0 0.0 + t = -7.4 + 1.6 t = -7.4 + 1.6 Combine like terms: -7.4 + 1.6 = -5.8 t = -5.8 Simplifying t = -5.8

Solution

The solution to the problem is based on the solutions from the subproblems. t = {9, -5.8}

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