The curves y = x^2-1 , y = 8x-x^2-9 a) i...

The curves `y = x^2-1 , y = 8x-x^2-9` a) intersect at right angles at (2, 3) b) touch each other at (2, 3) c) do not intersect at (2, 3) d) intersect at an angle `pi/3`

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