exam Maths Puzzle Numerical Ability

I have to do a really big project and I got stuck doing this. I do not know what is means. What is an algebraic expression using equations and inequalities? Will you give me examples of each.

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I need help with 3x^2 - 2x + 1 = 0

I came out with x = 2/6 + sqrt 8/6

Did I do this right?

I see the answer, but am confused on what the "i" means?
i would like to know how to sovle a equation 3y-2(y-1)/=-1 can u show me the processes to get the correct answer.