Units 1 Questions thread

[the.watchman]

a) Eqn:

sub x=8 into above:







So (8,3) is on the circle



b)

Let :







Because for one solution (thus tangent):







Follow the same process as above to find the other two answers (discriminant greater than zero, less than zero)

[luken93]

When its a show/prove that queestion, should you just sub in one value in hope that if finds the other one, or can you sub in x and y and find the answer to be 25?

Yay i got , I was worried though because it said values but I was pretty sure it was only 1, because the circle would touch the y-int?

For the other two, it would be and

Thanks

[the.watchman]

You can sub in one value, or show that LHS=RHS, whatever you prefer

Well your answer for the other two is not quite right:

For ,    (m can be less than zero )

And your second answer is wild, how can m be greater than 12/5 and less than zero??

For ,   

[luken93]

You can sub in one value, or show that LHS=RHS, whatever you prefer

Well your answer for the other two is not quite right:

For ,    (m can be less than zero )

And your second answer is wild, how can m be greater than 12/5 and less than zero??

For ,   

oh woops, what was i saying
dw, i was thinking on another tangent hahah
now i cant remember what i wrote though.....