ALG II
posted by Juli .
Write each rational expression in simplest form and list the values of the variables for which the fraction is undefined.
1. x^27x+12/x^2+2x15
2. 5y^220/y^2+4y+4
3. 7+7a/21a^221
4. 5(1b)+15/b^216

#2:
5(y^24)/(y+2)^2
5(y+2)(y2)/(y+2)^2
5(y2)/(y+2)
undefined where y+2=0, or y = 2.
Do the others in like wise. What do you get?