Answer: 3x - 9
Step-by-step explanation: "9 less than three times a number" does not mean 9 minus three times a number, less than actually switches the order around so that 9 less than three times a number actually means three times a number minus 1 which can be read as 3x - 9.
let's firstly convert the mixed fractions to improper fractions and then multiply.
The exact product would be 3032
Your answer in Vertex Form :
y = 2(x+2)^2-7