Probability of roiling a number less then 8

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

How do i put 3(x+7) in distributive property

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.