Expand and simplify the following: (7y-10)(9y+10)
First, let's expand the expression:
(7y - 10)(9y + 10) = 7y * 9y + 7y * 10 - 10 * 9y - 10 * 10
= 63y^2 + 70y - 90y - 100
= 63y^2 - 20y - 100
Now, let's simplify the expression:
63y^2 - 20y - 100