−45y^2+40y
To factor the expression -45y^2 + 40y, we need to find the greatest common factor of the terms.
The GCF of -45y^2 and 40y is 5y.
So, we can factor out 5y from the expression:
-45y^2 + 40y
= 5y(-9y + 8)
Therefore, the factored form of the expression -45y^2 + 40y is 5y(-9y + 8).