t^2+2t=1.2

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Solution for t^2+2t=1.2 equation:


Simplifying
t2 + 2t = 1.2

Reorder the terms:
2t + t2 = 1.2

Solving
2t + t2 = 1.2

Solving for variable 't'.

Reorder the terms:
-1.2 + 2t + t2 = 1.2 + -1.2

Combine like terms: 1.2 + -1.2 = 0.0
-1.2 + 2t + t2 = 0.0

Begin completing the square.

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + 2t + 1.2 + t2 = 0.0 + 1.2

Reorder the terms:
-1.2 + 1.2 + 2t + t2 = 0.0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 2t + t2 = 0.0 + 1.2
2t + t2 = 0.0 + 1.2

Combine like terms: 0.0 + 1.2 = 1.2
2t + t2 = 1.2

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 = 1.2 + 1

Reorder the terms:
1 + 2t + t2 = 1.2 + 1

Combine like terms: 1.2 + 1 = 2.2
1 + 2t + t2 = 2.2

Factor a perfect square on the left side:
(t + 1)(t + 1) = 2.2

Calculate the square root of the right side: 1.483239697

Break this problem into two subproblems by setting 
(t + 1) equal to 1.483239697 and -1.483239697.

Subproblem 1

t + 1 = 1.483239697 Simplifying t + 1 = 1.483239697 Reorder the terms: 1 + t = 1.483239697 Solving 1 + t = 1.483239697 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 = 1.483239697 + -1 Combine like terms: 1 + -1 = 0 0 + t = 1.483239697 + -1 t = 1.483239697 + -1 Combine like terms: 1.483239697 + -1 = 0.483239697 t = 0.483239697 Simplifying t = 0.483239697

Subproblem 2

t + 1 = -1.483239697 Simplifying t + 1 = -1.483239697 Reorder the terms: 1 + t = -1.483239697 Solving 1 + t = -1.483239697 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 = -1.483239697 + -1 Combine like terms: 1 + -1 = 0 0 + t = -1.483239697 + -1 t = -1.483239697 + -1 Combine like terms: -1.483239697 + -1 = -2.483239697 t = -2.483239697 Simplifying t = -2.483239697

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.483239697, -2.483239697}

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