Question 521498
a. =(s+4)(s+4)=(s+4)^2
b. =3(v^2-10v+25) = 3(v-5)(v-5)=3(v-5)^2
c. =s(36-121s^2)=s(6-11s)(6+11s)
d. =(0.8y-0.09)(0.8y+0.09) 
e. =(w+4)(w^2-4w+16)