4.9t^2-20.44t+15=0

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Solution for 4.9t^2-20.44t+15=0 equation:


Simplifying
4.9t2 + -20.44t + 15 = 0

Reorder the terms:
15 + -20.44t + 4.9t2 = 0

Solving
15 + -20.44t + 4.9t2 = 0

Solving for variable 't'.

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

Divide each side by '4.9'.
3.06122449 + -4.171428571t + t2 = 0

Move the constant term to the right:

Add '-3.06122449' to each side of the equation.
3.06122449 + -4.171428571t + -3.06122449 + t2 = 0 + -3.06122449

Reorder the terms:
3.06122449 + -3.06122449 + -4.171428571t + t2 = 0 + -3.06122449

Combine like terms: 3.06122449 + -3.06122449 = 0.00000000
0.00000000 + -4.171428571t + t2 = 0 + -3.06122449
-4.171428571t + t2 = 0 + -3.06122449

Combine like terms: 0 + -3.06122449 = -3.06122449
-4.171428571t + t2 = -3.06122449

The t term is -4.171428571t.  Take half its coefficient (-2.085714286).
Square it (4.350204083) and add it to both sides.

Add '4.350204083' to each side of the equation.
-4.171428571t + 4.350204083 + t2 = -3.06122449 + 4.350204083

Reorder the terms:
4.350204083 + -4.171428571t + t2 = -3.06122449 + 4.350204083

Combine like terms: -3.06122449 + 4.350204083 = 1.288979593
4.350204083 + -4.171428571t + t2 = 1.288979593

Factor a perfect square on the left side:
(t + -2.085714286)(t + -2.085714286) = 1.288979593

Calculate the square root of the right side: 1.135332371

Break this problem into two subproblems by setting 
(t + -2.085714286) equal to 1.135332371 and -1.135332371.

Subproblem 1

t + -2.085714286 = 1.135332371 Simplifying t + -2.085714286 = 1.135332371 Reorder the terms: -2.085714286 + t = 1.135332371 Solving -2.085714286 + t = 1.135332371 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.085714286' to each side of the equation. -2.085714286 + 2.085714286 + t = 1.135332371 + 2.085714286 Combine like terms: -2.085714286 + 2.085714286 = 0.000000000 0.000000000 + t = 1.135332371 + 2.085714286 t = 1.135332371 + 2.085714286 Combine like terms: 1.135332371 + 2.085714286 = 3.221046657 t = 3.221046657 Simplifying t = 3.221046657

Subproblem 2

t + -2.085714286 = -1.135332371 Simplifying t + -2.085714286 = -1.135332371 Reorder the terms: -2.085714286 + t = -1.135332371 Solving -2.085714286 + t = -1.135332371 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '2.085714286' to each side of the equation. -2.085714286 + 2.085714286 + t = -1.135332371 + 2.085714286 Combine like terms: -2.085714286 + 2.085714286 = 0.000000000 0.000000000 + t = -1.135332371 + 2.085714286 t = -1.135332371 + 2.085714286 Combine like terms: -1.135332371 + 2.085714286 = 0.950381915 t = 0.950381915 Simplifying t = 0.950381915

Solution

The solution to the problem is based on the solutions from the subproblems. t = {3.221046657, 0.950381915}

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