exam Maths Puzzle Numerical Ability

Apply using quadratic formula to find the roots and graph.
g(x)= x^2 - x - 12

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exam Other Question

Can you please explain to me step by step how this type of problem is solved.

For f(x) = 2x - 11, find f(2).

I greatly appreciate any help!
Thank you
Patti Can I have some help finding the inverse function of f?

f(x)=1/(-10 x^2 + 6),text( )x>=0