Help me here pls thank you appreciated very much

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

I’m really confused and need to learn this