exam Maths Puzzle Numerical Ability

what it the answer to this problem (-2x+5)(-x-10) is it 2x squared +15x -50

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Hi,
I have tried to figure this out without any luck. I hope you can help.

Andrea has 9 coins with a total value of 48 cents. What coins does she have?

Thank you so much!
Evaluate b²­2bc + c²if b = 3 and c = -2.