exam Maths Puzzle Numerical Ability

How do you solve 2n^2-4n=6 and then put it into a table or graph?

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exam Other Question

jENNIFER IS BUYING BOOKS FOR A DAY CARE CLASS. THE PAPERBACK BOOKS COST $4.00 EACH, AND THE HARDBACK BOOKS COST $9.00 EACH. SHE HAS $81.00 TO SPEND.

I) DEFINE YOUR VARIBLES (WH The question asks "write an equation for the line containing the indicated points."

they give me

1. (2,4)and (3,5)

SO WHAT DO I DO.