Which is equal to (2+3i)+(-4+i)?
A, -2-4i
B, -2-2i
C, -2+2i
D, -2+4i
E, 6+4i

D. -2+4i

Step-by-step explanation:

just combine like terms :)

-2+4i the ansewr is D.

Step-by-step explanation:

Verify Left hand:

Simplify the following:

2 + 3 i - 4 + i

2 + 3 i - 4 + i = (2 - 4) + (3 i + i):

(3 i + i) + (2 - 4)

2 - 4 = -2:

-2 + (3 i + i)

3 i + i = 4 i:

4 i - 2

Factor 2 out of 4 i - 2 giving 2 (2 i - 1):

2 (2 i - 1)

Verify Right Hand:

Simplify the following:

4 i - 2

Factor 2 out of 4 i - 2 giving 2 (2 i - 1):

2 (2 i - 1)

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional