(4y)(6y)=90

Solution for (4y)(6y)=90 equation:

Simplifying
(4y)(6y) = 90

Remove parenthesis around (4y)
4y(6y) = 90

Remove parenthesis around (6y)
4y * 6y = 90

Reorder the terms for easier multiplication:
4 * 6y * y = 90

Multiply 4 * 6
24y * y = 90

Multiply y * y
24y2 = 90

Solving
24y2 = 90

Solving for variable 'y'.

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

Divide each side by '24'.
y2 = 3.75

Simplifying
y2 = 3.75

Take the square root of each side:
y = {-1.936491673, 1.936491673}