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# differentiation homework help watch

1. (Original post by poppydoodle)
-5?
Looks good.
2. (Original post by RDKGames)
Looks good.
-5=x^2 - 7x +5

do you sub in 2
3. (Original post by poppydoodle)
-5=x^2 - 7x +5

do you sub in 2
I think you meant to put a at the end there?

And yes, sub in x=2 and solve for k.
4. (Original post by RDKGames)
I think you meant to put a at the end there?

And yes, sub in x=2 and solve for k.
so k=-5??? the answers say it’s 5
5. (Original post by poppydoodle)
so k=-5??? the answers say it’s 5
Check your arithmetic. It should be positive.
6. (Original post by RDKGames)
Check your arithmetic. It should be positive.
yep i got it 😊😊 thank you for all your help it’s very appreciated

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