exam Maths Puzzle Numerical Ability

Write the equation in the standard form for the indicated conic section.

A circle with Center (7,-4) and radius 6 units

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exam Other Question

PROBLEM:
LET f(x)=3x^2-2x+1. FIND THE FOLLOWING:
f(2)
*** IN THIS MY TEACHER SAYS THE ANSWER IS 9... BUT IT SEEMS EVERYTIME I WORK IT OUT I COME UP WITH 7... PLEASE HELP AND EXPLAIN WHAT I AM DOING WRONG STEP BY STEP... THANKS :) 2-(3(-4+1)*(9))=