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Find the equation of a Circle with centre (2,9) and radius 4.

In the form (x-x1)^2+(y-y1)^2=r^2
Hence equation is: (x-2)^2+(y-9)^2=16

Answered by Salman D. • Maths tutor

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Explain how integration via substitution works.

Integrate f(x): f(x) = (3x +2) / (x^2 - 5x +6)

Sketch the curve y = (2x-1)/(x+1) stating the equations of any asymptotes and coordinates of the intersection with the axis. As an extension, what standard transformations from C1 could you use on y=1/x to get this curve?

dy/dx of 2x (3x - 1)^5

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