SOLUTION: PLEASE HELP ME IF ANY ONE CAN PLEASE IF(3Y-1)(2Y+K)=AY^2+BY-5 FOR ALL VALUES OF Y,WHAT IS THE VALUE OF A+B?

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Question 924371: PLEASE HELP ME IF ANY ONE CAN PLEASE
IF(3Y-1)(2Y+K)=AY^2+BY-5 FOR ALL VALUES OF Y,WHAT IS THE VALUE OF A+B?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the FOIL method to work out the left hand side.
%283Y-1%29%282Y%2BK%29=6Y%5E2%2B3KY-2Y-K
%283Y-1%29%282Y%2BK%29=6Y%5E2%2B%283K%2B2%29Y-K
Now compare it to the right hand side.
1.A=6
2.3K%2B2=B
3.-K=-5
From eq. 3,
K=5
Use that in eq. 2,
3%285%29%2B2=B
B=17
So then,
A%2BB=6%2B17
A%2BB=23