Question

How do you find the product of `(8r-1)(r-6)`?

Answer 1

`(8r-1)(r-6) = 8r^2-49r+6`

Explanation:

If you find it helpful, you can use the FOIL mnemonic to remember all the combinations of terms to multiply:

`(8r-1)(r-6) = overbrace((8r)(r))^"First"+overbrace((8r)(-6))^"Outside"+overbrace((-1)(r))^"Inside"+overbrace((-1)(-6))^"Last"`

`color(white)((8r-1)(r-6)) = 8r^2-48r-r+6`

`color(white)((8r-1)(r-6)) = 8r^2-49r+6`