98=0.5(4)*x^2

Solution for 98=0.5(4)*x^2 equation:

Simplifying
98 = 0.5(4) * x2

Multiply 0.5 * 4
98 = 2x2

Solving
98 = 2x2

Solving for variable 'x'.

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

Add '-2x2' to each side of the equation.
98 + -2x2 = 2x2 + -2x2

Combine like terms: 2x2 + -2x2 = 0
98 + -2x2 = 0

Add '-98' to each side of the equation.
98 + -98 + -2x2 = 0 + -98

Combine like terms: 98 + -98 = 0
0 + -2x2 = 0 + -98
-2x2 = 0 + -98

Combine like terms: 0 + -98 = -98
-2x2 = -98

Divide each side by '-2'.
x2 = 49

Simplifying
x2 = 49

Take the square root of each side:
x = {-7, 7}