(2.5y-100)y+100y=9800

Solution for (2.5y-100)y+100y=9800 equation:

Simplifying
(2.5y + -100) * y + 100y = 9800

Reorder the terms:
(-100 + 2.5y) * y + 100y = 9800

Reorder the terms for easier multiplication:
y(-100 + 2.5y) + 100y = 9800
(-100 * y + 2.5y * y) + 100y = 9800
(-100y + 2.5y2) + 100y = 9800

Reorder the terms:
-100y + 100y + 2.5y2 = 9800

Combine like terms: -100y + 100y = 0
0 + 2.5y2 = 9800
2.5y2 = 9800

Solving
2.5y2 = 9800

Solving for variable 'y'.

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

Divide each side by '2.5'.
y2 = 3920

Simplifying
y2 = 3920

Take the square root of each side:
y = {-62.60990337, 62.60990337}