10T-5T^2=4

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Solution for 10T-5T^2=4 equation:


Simplifying
10T + -5T2 = 4

Solving
10T + -5T2 = 4

Solving for variable 'T'.

Reorder the terms:
-4 + 10T + -5T2 = 4 + -4

Combine like terms: 4 + -4 = 0
-4 + 10T + -5T2 = 0

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

Divide each side by '-5'.
0.8 + -2T + T2 = 0

Move the constant term to the right:

Add '-0.8' to each side of the equation.
0.8 + -2T + -0.8 + T2 = 0 + -0.8

Reorder the terms:
0.8 + -0.8 + -2T + T2 = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + -2T + T2 = 0 + -0.8
-2T + T2 = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
-2T + T2 = -0.8

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 = -0.8 + 1

Reorder the terms:
1 + -2T + T2 = -0.8 + 1

Combine like terms: -0.8 + 1 = 0.2
1 + -2T + T2 = 0.2

Factor a perfect square on the left side:
(T + -1)(T + -1) = 0.2

Calculate the square root of the right side: 0.447213596

Break this problem into two subproblems by setting 
(T + -1) equal to 0.447213596 and -0.447213596.

Subproblem 1

T + -1 = 0.447213596 Simplifying T + -1 = 0.447213596 Reorder the terms: -1 + T = 0.447213596 Solving -1 + T = 0.447213596 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 = 0.447213596 + 1 Combine like terms: -1 + 1 = 0 0 + T = 0.447213596 + 1 T = 0.447213596 + 1 Combine like terms: 0.447213596 + 1 = 1.447213596 T = 1.447213596 Simplifying T = 1.447213596

Subproblem 2

T + -1 = -0.447213596 Simplifying T + -1 = -0.447213596 Reorder the terms: -1 + T = -0.447213596 Solving -1 + T = -0.447213596 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 = -0.447213596 + 1 Combine like terms: -1 + 1 = 0 0 + T = -0.447213596 + 1 T = -0.447213596 + 1 Combine like terms: -0.447213596 + 1 = 0.552786404 T = 0.552786404 Simplifying T = 0.552786404

Solution

The solution to the problem is based on the solutions from the subproblems. T = {1.447213596, 0.552786404}

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