exam Maths Puzzle Numerical Ability

given f(x)=3x^2 - 5x + 2:
Find f(-4)

Find f(m+1)

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exam Other Question

Okay. I really have a question on this. I am on vacation and I did not receive notes for this section and my book did not show an example for this particular type of problem. It Solve the following equation for x.
2/5 = x - 2 /20