45=4.9*t^2

Solution for 45=4.9*t^2 equation:

Simplifying
45 = 4.9t2

Solving
45 = 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.
45 + -4.9t2 = 4.9t2 + -4.9t2

Combine like terms: 4.9t2 + -4.9t2 = 0.0
45 + -4.9t2 = 0.0

Add '-45' to each side of the equation.
45 + -45 + -4.9t2 = 0.0 + -45

Combine like terms: 45 + -45 = 0
0 + -4.9t2 = 0.0 + -45
-4.9t2 = 0.0 + -45

Combine like terms: 0.0 + -45 = -45
-4.9t2 = -45

Divide each side by '-4.9'.
t2 = 9.183673469

Simplifying
t2 = 9.183673469

Take the square root of each side:
t = {-3.030457634, 3.030457634}