MasterKen99 MasterKen99
  • 28-02-2017
  • Mathematics
contestada

Multiply (2 − 7i)(9 + 5i).
A) 53-53i
B) -17-53i
C) 18-35i^2
D) 18-53i-36i^2

Relax

Respuesta :

smorin52
smorin52 smorin52
  • 28-02-2017
(2-7i) (9+5i)

18+10i-63i-35i^2

i^2= -1 so -35*-1= 35

35+18= 53

-63i+10i= -53I

answer is 53-53i
Answer Link

Otras preguntas

After Pennsylvania experienced its oil boom in 1859, three other states discovered vast oil reserves. Name two of these states.
If you start skating down this hill, your potential energy will be converted to kinetic energy. At the bottom of the hill, your kinetic energy will be equal to
A jar contains five red marbles and three green marbles. A marble is drawn at random and notreplaced. A second marble is then drawn from the jar.1) Find the pr
The base of a right prism is a square with edge 4 . The volume is 128 . The height is ?
if 2x=4 what is the value of x
The greatest common factor of 3m2n + 12mn2 is
numbers 20 - 22 please
Rationalise:(1)              4/(2+root3+root7)(2)              4/(2root3+root5)
what is a pro-sentence?
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish sc