Question 326298
Start with:
−4y^2 − 12y 
Pull out what's common...we begin by pulling out a negative 1:
-1(4y^2 + 12y)
or it can be written as:
-(4y^2 + 12y)
Next, pull out a 4:
-4(y^2 + 3y)
Finally, pull out a y:
-4y(y + 3)
(-4y)(y + 3)