Question

Two Parter Part 2

Use the FOIL method to solve 15-21

15: (k+5) (k-1)
16: (x-4) (x+8)
17: (q-3) (q-4)
18: (z-5) (z-9)
19: (t+2) (2t+1)
20: (5v-3) (2v+4)
21: (9-r) (2-3r)

Answer 1

15: (k+5) (k-1)=
`k ^(2) +4k-5`
16: (x-4) (x+8)=
`x^(2) +4x-32`
17: (q-3) (q-4)=
`q^(2) -7q+12`
18: (z-5) (z-9)=
`z^(2) -14z+45`
19: (t+2) (2t+1)=
`2 t^(2) +5t+2`
20: (5v-3) (2v+4)=
`10 v^(2) +14v-12`
21: (9-r) (2-3r)=
`3r ^(2) -29r+18`