Question

help will medal and fan
multiply
(3a+7)(-4a-5)
have four of these

Answer 1

1
Apply the FOIL method: (a+b)(c+d)=ac+ad+bc+bd
−12a^2−15a−28^a−35

2
Gather like terms
−12a^2+(−15a−28a)−35

3
Simplify
−12a^2−43a−35

Answer 2

Use the FOIL method

multiply pairs from each bracket in this order:

F irst
O utside
I nside
L ast