Question

Simplify..

Answer 1

(4-3i)-(-8+i)

Answer 2

(4-(-8))+(-3-1)i

Answer 3

What are the like terms in this expression?

Answer 4

\(\large\color{black}{ \displaystyle (a-b)-(-c+d)}\)

\(\large\color{black}{ \displaystyle a-b+c-d}\)

Answer 5

just doing it abstractly but with these signs, you should first go about this problem in a similar matter.

Answer 6

Huh?

Answer 7

And whether i is an imaginary number √(-1) , or just a variable like a,b, c and on...

`you should expand the parenthesis and add like terms`

Answer 8

I know the answer is 12-4i

But how?

Answer 9

You added the like terms.

Answer 10

Or, more creative

(4-3i)-(-8+i)

(12-8-3i)-(-8+i)

(12-8-4i+i)-(-8+i)

(12-4i-8+i)-(-8+i)

(12-4i)+(-8+i)-(-8+i)

Answer 11

I assume 4+8= 12 and -3-1=-4

But my example (5-7i)-(9-9i) does it different

Answer 12

That ones is -4-2i

5+9 doesnt equal -4.. Please explain this

Answer 13

Its because it is 5-9=-4 not +

Answer 14

(5-(-9)) +(-7-1)

two negatives turn into a positive--> (5+9) +(-7+1)

@14mdaz

Answer 15

i thought you said it was (5-7i)-(9-9i), so when you expand it all out its 5-7i-9--9i=-4-2i