exam Maths Puzzle Numerical Ability

Please help with this problem:
Find all zeros of f: f(x) = 3x^2 + 5x - 2
I believe you use the quadratic formula to solve or do I need to factor?

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exam Other Question

Of $50,000 that natasha pocketed on her last real estate deal, $20,000 went to charity. She invested part of the remainder in Dreyfus New Leaders fund with an annual yield of 16% a could you help me with this equation? it is from a question we had in class.

The focus of (x-1)^2 = (y-2) is_____.

i said the answer is (-2,-1)
can you tell me if i got it right? thanks for any help.