4.9t^2+360t-2160=0

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Solution for 4.9t^2+360t-2160=0 equation:


Simplifying
4.9t2 + 360t + -2160 = 0

Reorder the terms:
-2160 + 360t + 4.9t2 = 0

Solving
-2160 + 360t + 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'.
-440.8163265 + 73.46938776t + t2 = 0

Move the constant term to the right:

Add '440.8163265' to each side of the equation.
-440.8163265 + 73.46938776t + 440.8163265 + t2 = 0 + 440.8163265

Reorder the terms:
-440.8163265 + 440.8163265 + 73.46938776t + t2 = 0 + 440.8163265

Combine like terms: -440.8163265 + 440.8163265 = 0.0000000
0.0000000 + 73.46938776t + t2 = 0 + 440.8163265
73.46938776t + t2 = 0 + 440.8163265

Combine like terms: 0 + 440.8163265 = 440.8163265
73.46938776t + t2 = 440.8163265

The t term is 73.46938776t.  Take half its coefficient (36.73469388).
Square it (1349.437734) and add it to both sides.

Add '1349.437734' to each side of the equation.
73.46938776t + 1349.437734 + t2 = 440.8163265 + 1349.437734

Reorder the terms:
1349.437734 + 73.46938776t + t2 = 440.8163265 + 1349.437734

Combine like terms: 440.8163265 + 1349.437734 = 1790.2540605
1349.437734 + 73.46938776t + t2 = 1790.2540605

Factor a perfect square on the left side:
(t + 36.73469388)(t + 36.73469388) = 1790.2540605

Calculate the square root of the right side: 42.31139398

Break this problem into two subproblems by setting 
(t + 36.73469388) equal to 42.31139398 and -42.31139398.

Subproblem 1

t + 36.73469388 = 42.31139398 Simplifying t + 36.73469388 = 42.31139398 Reorder the terms: 36.73469388 + t = 42.31139398 Solving 36.73469388 + t = 42.31139398 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-36.73469388' to each side of the equation. 36.73469388 + -36.73469388 + t = 42.31139398 + -36.73469388 Combine like terms: 36.73469388 + -36.73469388 = 0.00000000 0.00000000 + t = 42.31139398 + -36.73469388 t = 42.31139398 + -36.73469388 Combine like terms: 42.31139398 + -36.73469388 = 5.5767001 t = 5.5767001 Simplifying t = 5.5767001

Subproblem 2

t + 36.73469388 = -42.31139398 Simplifying t + 36.73469388 = -42.31139398 Reorder the terms: 36.73469388 + t = -42.31139398 Solving 36.73469388 + t = -42.31139398 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '-36.73469388' to each side of the equation. 36.73469388 + -36.73469388 + t = -42.31139398 + -36.73469388 Combine like terms: 36.73469388 + -36.73469388 = 0.00000000 0.00000000 + t = -42.31139398 + -36.73469388 t = -42.31139398 + -36.73469388 Combine like terms: -42.31139398 + -36.73469388 = -79.04608786 t = -79.04608786 Simplifying t = -79.04608786

Solution

The solution to the problem is based on the solutions from the subproblems. t = {5.5767001, -79.04608786}

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