exam Maths Puzzle Numerical Ability

Factor trinomials.
2x^2+7x-15
(2x )(7x )
How?

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Please help me begin to solve:

1-2/x-8/x^2=0 A concert brought in $27,200 on the sale of 4,000 tickets. If the tickets sold for $5 and 8$, how much each was sold?