Question

how do i simplify -5i-(-4+6i) and write it in standard form?

Answer 1

Group like terms first. Can you do that?

Answer 2

multiply the once in bracket by -
it gives you
-5i+4-6i
collect like terms;we have
-5i-6i+4
-11i+4

Answer 3

actually the final answer is 4-11i but thank you

Answer 4

So in standard form it is 4-11i

Answer 5

okay so what about (-2+i)(-3-4i)

Answer 6

Is the answer 10+5i? If so shall I run thru the solution?

Answer 7

yes

Answer 8

please explain

Answer 9

When you multiply the two terms you get:
6-3i+8i+4.
Remember that i^2=-1. Can you follow the step above?

Answer 10

yes

Answer 11

thank u

Answer 12

Then you group like terms:
(6+4) +(-3i+8i)=10+5i