Simplify the given expression:
(−5 + 3i) • (1 − 2i)
I've been having trouble with these... I use FOIL and then combine like terms but the answer I come up with is never an option. These are my four options the closest one to my answer is the second one.
−5 − 6i
1 + 13i
2 + i
4 − 5i

Question

Simplify the given expression:
 (−5 + 3i) • (1 − 2i)
 I've been having trouble with these... I use FOIL and then combine like terms but the answer I come up with is never an option. These are my four options the closest one to my answer is the second one. 
−5 − 6i
 1 + 13i
 2 + i 
4 − 5i

nurali · Answer

(−5 + 3i) • (1 − 2i)
-5+10i+3i-6i^2
-5+13i+6
1+13i

haseeb96 · Answer

yes @ nurali @abbyrose0105  u both are correct

abbyrose0105 · Answer

yayy I was right! But I believe what I am getting confused about is after using foil what is added or subtracted. For example if I have (2-5i) *(4+7i) how do I know to add or subtract after distributing?

haseeb96 · Answer

if u are multiply + into - = - 
and if u multiply - into - = + 
and if  - into + = -
and if + into + = +  
like this when u will multiply them then condition will come itself then just look the sign either there is - or +

abbyrose0105 · Answer

Got it thanks so much!!!

nurali · Answer

Anytime.

haseeb96 · Answer

most welcome sister

anonymous · Answer

I can help

abbyrose0105 · Answer

@fullerce43  I've got this one but I'll let you know if I need help with another one. Thanks!