exam Maths Puzzle Numerical Ability

express as a binomial: 5(x+2)+2(1-6x)

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exam Other Question

If f(x)=a(x-2)2 +3, is the function whose graph contains the point (4,9), find a. I answered 4/9. Is that correct? Please work so I can see. Thanks write equation in point-slope form of line that passes thru given point and has given slope m.
(1,9);m= -3
could you explain how to do this?