1)Use synthetic subsitution to find f(-3)for f(x)=x^4-4x^3+2x^2-4x+6
answer= -15
2)One factor of x^3+2x^2-11x-12 is x+4. find the remaining factors
answer= x-1;x-3
3)Which describes the number and type of roots of the equation x^3+121x=0
answer= 1 real root,two imaginary roots
4)State the possible number of imaginary zeros of g(x)=x^4+3x^3+7x^2-6x-13
answer= 2,4,or 0
1. check your arithmetic, I got 225
2. I had (x-3)(x+1), (the answer after the division was x^2 - 2x -3
3. yes
4. there are two reals and two imaginary
these two webpages might come in handy in the future, bookmark them
http://www.walterzorn.com/grapher/grapher_e.htm
http://www.hostsrv.com/webmab/app1/MSP/quickmath/02/pageGenerate?site=quickmath&s1=equations&s2=solve&s3=basic
1 answer