5t^2=5-2t

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Solution for 5t^2=5-2t equation:


Simplifying
5t2 = 5 + -2t

Solving
5t2 = 5 + -2t

Solving for variable 't'.

Reorder the terms:
-5 + 2t + 5t2 = 5 + -2t + -5 + 2t

Reorder the terms:
-5 + 2t + 5t2 = 5 + -5 + -2t + 2t

Combine like terms: 5 + -5 = 0
-5 + 2t + 5t2 = 0 + -2t + 2t
-5 + 2t + 5t2 = -2t + 2t

Combine like terms: -2t + 2t = 0
-5 + 2t + 5t2 = 0

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

Divide each side by '5'.
-1 + 0.4t + t2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 0.4t + 1 + t2 = 0 + 1

Reorder the terms:
-1 + 1 + 0.4t + t2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 0.4t + t2 = 0 + 1
0.4t + t2 = 0 + 1

Combine like terms: 0 + 1 = 1
0.4t + t2 = 1

The t term is 0.4t.  Take half its coefficient (0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
0.4t + 0.04 + t2 = 1 + 0.04

Reorder the terms:
0.04 + 0.4t + t2 = 1 + 0.04

Combine like terms: 1 + 0.04 = 1.04
0.04 + 0.4t + t2 = 1.04

Factor a perfect square on the left side:
(t + 0.2)(t + 0.2) = 1.04

Calculate the square root of the right side: 1.019803903

Break this problem into two subproblems by setting 
(t + 0.2) equal to 1.019803903 and -1.019803903.

Subproblem 1

t + 0.2 = 1.019803903 Simplifying t + 0.2 = 1.019803903 Reorder the terms: 0.2 + t = 1.019803903 Solving 0.2 + t = 1.019803903 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + t = 1.019803903 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + t = 1.019803903 + -0.2 t = 1.019803903 + -0.2 Combine like terms: 1.019803903 + -0.2 = 0.819803903 t = 0.819803903 Simplifying t = 0.819803903

Subproblem 2

t + 0.2 = -1.019803903 Simplifying t + 0.2 = -1.019803903 Reorder the terms: 0.2 + t = -1.019803903 Solving 0.2 + t = -1.019803903 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-0.2' to each side of the equation. 0.2 + -0.2 + t = -1.019803903 + -0.2 Combine like terms: 0.2 + -0.2 = 0.0 0.0 + t = -1.019803903 + -0.2 t = -1.019803903 + -0.2 Combine like terms: -1.019803903 + -0.2 = -1.219803903 t = -1.219803903 Simplifying t = -1.219803903

Solution

The solution to the problem is based on the solutions from the subproblems. t = {0.819803903, -1.219803903}

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