10=0.5(9.8)(x^2)

Solution for 10=0.5(9.8)(x^2) equation:

Simplifying
10 = 0.5(9.8)(x2)

Multiply 0.5 * 9.8
10 = 4.9x2

Solving
10 = 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.
10 + -4.9x2 = 4.9x2 + -4.9x2

Combine like terms: 4.9x2 + -4.9x2 = 0.0
10 + -4.9x2 = 0.0

Add '-10' to each side of the equation.
10 + -10 + -4.9x2 = 0.0 + -10

Combine like terms: 10 + -10 = 0
0 + -4.9x2 = 0.0 + -10
-4.9x2 = 0.0 + -10

Combine like terms: 0.0 + -10 = -10
-4.9x2 = -10

Divide each side by '-4.9'.
x2 = 2.040816327

Simplifying
x2 = 2.040816327

Take the square root of each side:
x = {-1.428571429, 1.428571429}