Asked by jacob

factorize the following expressions and if possible show your steps

4x+20

3y^2+12y

x^2+4y-21
Answered by Reiny
#1, common factor is 4
so ....
#2, common factor is 3y
so ....

#3, a trinomial, you will need two number that
have a sum of 4 and a product of -21