Question

Which expression is equal to (5-2i)-(1+3i)
A)4+3i
B)4+i
C)6-5i
D)4-5i
i think it's A

Answer 1

So you'd simplify this exactly like you would multiply out brackets.

Answer 2

I don't even know how to multiply out brackets.

Answer 3

u dont have to multiply out the brackets

Answer 4

just distribute the negative sign to the second bracket

Answer 5

so we have 5-2i-1-3i

Answer 6

now group like term and simplify

Answer 7

and no its not A

Answer 8

I only thought it was A because if you do 5-2=4 and 1+3=4

Answer 9

but 5-2i arent like term... they can not =4

Answer 10

5-2i-1-3i
= 5-1 are like term and -2i-3i are like terms

Answer 11

so it would be 4 and -5

Answer 12

4-5i

Answer 13

Thank you could help me with one more?

Answer 14

ok

Answer 15

Which expression is equal to -2i(4-i)
A)8-2i
B)-2-8i
C)-8-2i
D)2-8i

Answer 16

distribute the -2i to the bracket

Answer 17

you do 2x4=8i so it would be 2-8i??

Answer 18

and none of those expressions would equal to that
you shd get -2i*4+2i^2
-8i+2i^2

Answer 19

I'm a bet confuse on what should I do??

Answer 20

-2i multiple to 4 = -8i and
-2i multiply to -i =2i^2

Answer 21

r u sure u wrote the expression correctly??