Answer:
FOIL
Step-by-step explanation:
First
Outside
Inside
Last
If you dont fully understand look at the attachment
-9x - 2
-9 (7) - 2
-63 - 2
-65
The real part (-6)
the imaginary part 2i
31 i hope u got it right !!
Answer:
-9
Step-by-step explanation:
We are summing the 3rd 4th and 5th terms because k goes from 3 to 5
The third term is
-2(3) +5 = -6+5 = -1
The fourth term is
-2(4) + 5 = -8+5 = -3
The fifth term is
-2(5) +5 = -10 +5 = -5
Add these 3 terms together
-1+-3+-5 = -9