Problems 35, 36, 47, and 48 I have been having some trouble with....

35 and 36

For B...i had to find the zeros with a calculator

for part c, I had to find the zeros algebraically

47 and 48

i had to find the zeros and max and min with a calculator

for 47, i am a little confused about the +- part....

I do not know is I am doing these correctly...if someone could take a look at my work, it would be greatly appreciated