Question

what is the product of (a-5)and( a+3)

Answer 1

\[a^2-5a+3a-15\]
which is equal to
\[a^2-2a-15\]
Remember to use foil when expanding binomials :)

Answer 2

where did you get 15

Answer 3

remember in foil that the last step is to multiply both lasts, which in this case is -5 and 3. -5*3 is equal to -15.

Answer 4

oh ok thanks