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# factor theorom help watch

1. given that: g(y)=2(3^3y)-5(3^2y)-9(3^y)+18

find values of y that satisfy g(y)=0 giving answers to 2 decimal places where appropriate
2. (Original post by olololololololol)
given that: g(y)=2(3^3y)-5(3^2y)-9(3^y)+18

find values of y that satisfy g(y)=0 giving answers to 2 decimal places where appropriate
What have you tried so far?

If you show us your workings we'll be able to point you in the right direction
3. (Original post by olololololololol)
given that: g(y)=2(3^3y)-5(3^2y)-9(3^y)+18

find values of y that satisfy g(y)=0 giving answers to 2 decimal places where appropriate
Have you tried letting equal some variable, say , for example?

You could use this and then solve to find the values of , and then go on to solve for .
4. I believe this is from the June 2013 C2 paper?

If you notice, it is a slightly altered version of the equation you factorised in part b. Therefore, find the solutions for x from part b and then set 3^y equal to each of these values and you will get your answer!

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Updated: May 16, 2015
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