So I don't think many people quite understood what we were supposed to do in the worksheet today. I would try to explain, but we had to turn in the worksheet. I remember there being everything we took notes on, but I still did not quite understand how to do it. As for the worksheet we were supposed to turn in today: I thing I got the hang of it, but when I saw w8hat other people 1put as the answers, I got really confused. I know we were supposed to figure out which ones were supposed to use the rational root theorem, quadratic form, and factor by grouping but I still didn't quite know how to do them. Examples:
5) y=2x^3-7x+2
13) y=x^4-7x^2-8
18) y=x^3-6x^2
22) y=x^5-3x^4+3^3-5x^2+12
These are just a select few that I had no clue what to do or even where to start.
you can solve these problems by factoring, quadratic form, & the rational root theorem..you just got to know when what works:
ReplyDeletefactoring: must have an equal # of terms
quadratic form: must only have 3 terms, 1st term must equal 2nd exponent/2, last term must be a #..make g = x..so you get g^2 + g + #..next solve by doin' quadratic formula, factoring, or complete the square..then plug back in for x
rational root theorem: find all possibile roots p/q..(p:all factors of the constant & q:all factors of the leading coeff.)..check to see which roots work using your calculator..do synthetic division to factor all roots..then solve the quadratic..
#5 - idk
#13 - quadratic form
#18 - factor
#22 - rational root theorem
hope this was helpful...