(-2y + 5) (y + 3)

Expanding the expression:

-2y^2 - 6y + 5y + 15

Simplifying:

-2y^2 - y + 15

To simplify the expression (-2y + 5)(y + 3), you can use the distributive property. This property states that for any numbers a, b, and c:

(a + b) * c = a * c + b * c

So in this case, you can apply the distributive property to the expression as follows:

(-2y + 5)(y + 3) = -2y * (y + 3) + 5 * (y + 3)

Now, you can simplify each term separately:

-2y * y = -2y^2

-2y * 3 = -6y

5 * y = 5y

5 * 3 = 15

Putting it all together, you get:

-2y^2 - 6y + 5y + 15

Further simplifying the expression:

-2y^2 - y + 15