4.9t^2-30t+10=0

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Solution for 4.9t^2-30t+10=0 equation:


Simplifying
4.9t2 + -30t + 10 = 0

Reorder the terms:
10 + -30t + 4.9t2 = 0

Solving
10 + -30t + 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'.
2.040816327 + -6.12244898t + t2 = 0

Move the constant term to the right:

Add '-2.040816327' to each side of the equation.
2.040816327 + -6.12244898t + -2.040816327 + t2 = 0 + -2.040816327

Reorder the terms:
2.040816327 + -2.040816327 + -6.12244898t + t2 = 0 + -2.040816327

Combine like terms: 2.040816327 + -2.040816327 = 0.000000000
0.000000000 + -6.12244898t + t2 = 0 + -2.040816327
-6.12244898t + t2 = 0 + -2.040816327

Combine like terms: 0 + -2.040816327 = -2.040816327
-6.12244898t + t2 = -2.040816327

The t term is -6.12244898t.  Take half its coefficient (-3.06122449).
Square it (9.371095378) and add it to both sides.

Add '9.371095378' to each side of the equation.
-6.12244898t + 9.371095378 + t2 = -2.040816327 + 9.371095378

Reorder the terms:
9.371095378 + -6.12244898t + t2 = -2.040816327 + 9.371095378

Combine like terms: -2.040816327 + 9.371095378 = 7.330279051
9.371095378 + -6.12244898t + t2 = 7.330279051

Factor a perfect square on the left side:
(t + -3.06122449)(t + -3.06122449) = 7.330279051

Calculate the square root of the right side: 2.707448809

Break this problem into two subproblems by setting 
(t + -3.06122449) equal to 2.707448809 and -2.707448809.

Subproblem 1

t + -3.06122449 = 2.707448809 Simplifying t + -3.06122449 = 2.707448809 Reorder the terms: -3.06122449 + t = 2.707448809 Solving -3.06122449 + t = 2.707448809 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.06122449' to each side of the equation. -3.06122449 + 3.06122449 + t = 2.707448809 + 3.06122449 Combine like terms: -3.06122449 + 3.06122449 = 0.00000000 0.00000000 + t = 2.707448809 + 3.06122449 t = 2.707448809 + 3.06122449 Combine like terms: 2.707448809 + 3.06122449 = 5.768673299 t = 5.768673299 Simplifying t = 5.768673299

Subproblem 2

t + -3.06122449 = -2.707448809 Simplifying t + -3.06122449 = -2.707448809 Reorder the terms: -3.06122449 + t = -2.707448809 Solving -3.06122449 + t = -2.707448809 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '3.06122449' to each side of the equation. -3.06122449 + 3.06122449 + t = -2.707448809 + 3.06122449 Combine like terms: -3.06122449 + 3.06122449 = 0.00000000 0.00000000 + t = -2.707448809 + 3.06122449 t = -2.707448809 + 3.06122449 Combine like terms: -2.707448809 + 3.06122449 = 0.353775681 t = 0.353775681 Simplifying t = 0.353775681

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.768673299, 0.353775681}

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