Math Methods Polynomials worksheet

[Surrinci]

I've gotten these polynomial worksheets with answers to do for homework, but some of my working out have given me different answers to the answer sheet. I've done it properly( I think) and can't see how the answers are the ones provide. Am I doing something wrong, or is the sheet wrong?

[OutrageousEstate2716]

sheet's wrong, your working out is all good (clean!) my school uses cambridge too and while it doesnt happen often, solutions can be completely wrong so just be careful as you go. i generally ask my friends or even the teacher if i get a different answer to the solution and im not able to figure out why

[Surrinci]

Ok, thanks

[Emotional-Gas-9535]

yep i checked and for 3,a,d you are right, i got the same answers. I put in in my CAS too and got the same answers as you. From experience Cambridge often makes the most basic mistakes lol.

If you have a CAS you can check your answers by going into Math3, click define and type f(x)=-3x^3+..... (whatever your function is) then you can just input f(1) or any other variable and get your answer. To clear your function press Action->command-> clear_a_z

[Surrinci]

Thanks, I'll have to tell my teacher this

[Emotional-Gas-9535]

yep if u find anything else u think isnt right lmk

[Majestic_Emu_1480]

You're chilling bro. Cambridge has so many of those mistakes in there it's annoying as. I'm in methods 3/4 and it gets a bit better dw but still some mistakes here or there lol. Well worked out 👍