20-4.9x^2=5

Solution for 20-4.9x^2=5 equation:

Simplifying
20 + -4.9x2 = 5

Solving
20 + -4.9x2 = 5

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + -4.9x2 = 5 + -20

Combine like terms: 20 + -20 = 0
0 + -4.9x2 = 5 + -20
-4.9x2 = 5 + -20

Combine like terms: 5 + -20 = -15
-4.9x2 = -15

Divide each side by '-4.9'.
x2 = 3.06122449

Simplifying
x2 = 3.06122449

Take the square root of each side:
x = {-1.749635531, 1.749635531}