(5y)(4y)=250

Solution for (5y)(4y)=250 equation:

Simplifying
(5y)(4y) = 250

Remove parenthesis around (5y)
5y(4y) = 250

Remove parenthesis around (4y)
5y * 4y = 250

Reorder the terms for easier multiplication:
5 * 4y * y = 250

Multiply 5 * 4
20y * y = 250

Multiply y * y
20y2 = 250

Solving
20y2 = 250

Solving for variable 'y'.

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

Divide each side by '20'.
y2 = 12.5

Simplifying
y2 = 12.5

Take the square root of each side:
y = {-3.535533906, 3.535533906}