Search results

thx for that. however I dont understand how u got taht when u differentiated. u sed: (x+4)^2 + (y-1)^2 = 25 but i get 2x + 8 + 2y - 2 when i differentiated can u explain what u did to get (x+4)^2 + (y-1)^2 = 25?

I got a maths poblem. Studying for yr 12 Half yearlies, as Im sure many of you are aswell. question: Find the centre and radius of the circle with equation x^2 + y^2 + 8x - 2y - 8 = 0 My teacher told me I had half it and square it, thus i got: x^2 + 8x + 16 + y^2 - 2y +1 = 16+1+8...