p18johnsonj p18johnsonj
  • 15-03-2018
  • Mathematics
contestada

What is the standard form of (1 + 7i)(3 − i)?

Respuesta :

evgeniylevi
evgeniylevi evgeniylevi
  • 15-03-2018
Consider this option:
1. if the standard form is z=x+iy, then
2. (1+7i)(3-i)=1*3-1*i+21i-7i*i=3-i+21i+7=10+20i

answer: 10+20i
Answer Link

Otras preguntas

HELP!!!!!!!!!!!!!!!!!!!!!!!!
Find two consecutive positive integers 545
Concert these from mixed numbers to improper fractions 3 2/5 2 1/6
Nearly one in five people in the united states speaks a language other than english at home, a percentage that is growing. _____________ is growing increasingly
How much must harry's hardware deposit at a 14.5% annual interest for 240 days in order to earn $500 in simple interest?
I need help with 6a and b...I don’t understand how to solve for x
a home owner wants carpet two rooms that each measure 12ft by 15 ft. how many square yards of carpet should be ordered?
In the table above the output level where the price minus atc (average total cost) is a maximum (or least negative) is the maximum profit position. this occurs
first 33.25 was divided by some number. the resulting quotient was then multiplied by 7. following this 5.9 was subtracted
Work out 28% of £85000