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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...