Have two problems that I need assistance with:



&

Convert the rectangular equation to polar form.
y^2 - 8x - 16 = 0.


If anyone is able to help, that'd be greatly appreciated, thanks.

if x = 1 dat answer is 1 bro

I tried using the quadratic formula for the second problem, seems to be the correct approach.

Only need help on the first one now.

f(x) = (1/√x - 1/√7) / ( x - 7 )
f(x) = (√7 / √(7x) - √x / √(7x) ) / ( x - 7 )
f(x) = ( √7 - √x ) / [ √(7x) * ( x - 7 ) ]
f(x) = ( √7 - √x ) / [ √(7x) * ( √x - √7 ) * ( √x + √7 ) ]
f(x) = - 1 / [√(7x) * (√x + √7) ]

Now, it should be clear that limit, as x approach 7, of f(x) is - 1 / (14√7)

Thanks