77=4.9t^2

Solution for 77=4.9t^2 equation:

Simplifying
77 = 4.9t2

Solving
77 = 4.9t2

Solving for variable 't'.

Move all terms containing t to the left, all other terms to the right.

Add '-4.9t2' to each side of the equation.
77 + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
77 + -4.9t2 = 0.0

Add '-77' to each side of the equation.
77 + -77 + -4.9t2 = 0.0 + -77

Combine like terms: 77 + -77 = 0
0 + -4.9t2 = 0.0 + -77
-4.9t2 = 0.0 + -77

Combine like terms: 0.0 + -77 = -77
-4.9t2 = -77

Divide each side by '-4.9'.
t2 = 15.71428571

Simplifying
t2 = 15.71428571

Take the square root of each side:
t = {-3.964124835, 3.964124835}