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whats the dy/dx ?

i see..why are you studying tangents then ? you need to clear up the basics first..

am well my teacher probably does it a different way than you do...

hmm..what does he do? differentiate instead of finding dy/dx? o.O

no we have never done differentiate yet just what does dy/ dx stand for ?

it'll come after you differentiate,,nevermind,,must be some alternative way then..

ok that seems more familiar we use the formula y - y1 = m(x-x1)

(3,1) is the center and the radius is 5

yes.. correct
next can u determine the slope of line which parallel with line
3x + 4y + 10 = 0 ?

is it 3 ?

so the slope would be -3/4 ?

looks too many formula above, hahaha...

haha is it right ?

yes, of couse

oh thank god haha

u just plug of them, write out ur equation
welcome...

the answer in the back of the book id diff from the answer i got

what's the book answer ?

3x + 4y + 12 =0 or 3x + 4y - 38 = 0

wait, i will check it...

ok thanks :)

the formula above have worked... i got like ur book answer

i have no idea where i went wrong ?

ok, let's check it steps by steps...

first, we have the center of circle (3,1) and its radius = 5 right ?

oh wait i know what i did i didn't use the whole formula only the first part

then the sope of line 3x+4y+10=0 is m1=-3/4
so, m2 = -3/4 also (because parallel)

i got so far 3x+4y - 13 = +- 25(25/16) ?

whats *sqrt ? is it square root?

* the symbol of multiplication
sqrt = square root

oooh thats what i was doing rong i didn't know what that was :P

hahahaha... u must KNOW it

haha sorry yeah i got it now i was squaring 5 :P whoops thanks for your help

you're welcome :)