SOLUTION: can u help me with this specific problem i dont understand it its 4(7-i)-5(2-6i) i would greatly appreciate it thanks

Question 20861: can u help me with this specific problem i dont understand it its 4(7-i)-5(2-6i) i would greatly appreciate it thanks
Answer by venugopalramana(3286) (Show Source): You can put this solution on YOUR website!
4(7-i)-5(2-6i)
HOPE YOU KNOW COMPLEX NUMBERS...FOR ELEMENTARY UNDERSTANDING IT SUFFICES TO KNOW THAT WE DESIGNATE SQUARE ROOT OF -1 AS i WHICH IS AN IMAGINARY NUMBER..WHERE AS 1,2,3 ETC..ARE ALL REAL NUMBERS..WE CANT MIX THEM LIKE WE CANT ADD 2 APPLES TO 3 GRAPES AND SAY THAT THERE ARE 5 APPLES OR 5 GRAPES..WE CAN ONLY SAY THAT THERE ARE 2 APPLES AND 3 GRAPES..SO WE DEAL WITH REAL NUMBERS AND IMAGINARY NUMBERS SEPERATELY AND CALL THEM TOGETHER AS COMPLEX NUMBERS
4(7-i)-5(2-6i)=4*7-4i-(5*2-5*6i)=28-4i-10+30i=(28-10)+i(30-4)=18+26i
RELATED QUESTIONS
i need help please try this problem 7-3(5-u)=5(u-4) if anyone could help i would greatly... (answered by Earlsdon)

I would appreciate anyone who can help me with this problem. I have been racking my... (answered by edjones)

I'm trying to figure out slope, I understand some of it but I'm pretty confused with it... (answered by josgarithmetic)

HI I would like to know if someone can help me understand the steps for this problem. (answered by ankor@dixie-net.com)

i need help with this problem 5a divided by 7 equals -10 the 5a is over the 7. if u could (answered by stanbon)

Please help me with this problem. I am confused and am trying to learn how to solve this... (answered by jim_thompson5910,stanbon)

f(x) = | x − 2 | can someone help me with this question please?? I would greatly... (answered by MathLover1)

I need help with these problems. I thoughly dont understand them. Simplify the... (answered by College Student)

Can you help me with this problem? I would really appreciate it. Factor the... (answered by Alan3354,josmiceli)