Question

t = - 4 and r = 2
-3(1 + r) + 4 (2+ - 3r) – (21-r)​

Answer 1

Step-by-step explanation:

-3(1+r) +4(2+3r) - (21 -r)

Putting the value of r

-3(1+2) + 4(2+3*2) -(21- r)

-9 + 4(2+6) -(21- 2)

-9 + 32 - 19

= 4 ans