300=0.5(9.8)x^2

Solution for 300=0.5(9.8)x^2 equation:

Simplifying
300 = 0.5(9.8) * x2

Multiply 0.5 * 9.8
300 = 4.9x2

Solving
300 = 4.9x2

Solving for variable 'x'.

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

Add '-4.9x2' to each side of the equation.
300 + -4.9x2 = 4.9x2 + -4.9x2

Combine like terms: 4.9x2 + -4.9x2 = 0.0
300 + -4.9x2 = 0.0

Add '-300' to each side of the equation.
300 + -300 + -4.9x2 = 0.0 + -300

Combine like terms: 300 + -300 = 0
0 + -4.9x2 = 0.0 + -300
-4.9x2 = 0.0 + -300

Combine like terms: 0.0 + -300 = -300
-4.9x2 = -300

Divide each side by '-4.9'.
x2 = 61.2244898

Simplifying
x2 = 61.2244898

Take the square root of each side:
x = {-7.824607965, 7.824607965}