SOLUTION: Could someone Please help me!!! It would be most appreciated:) Question: 1)(3+sqrt(-16))(4+sqrt(-9)) This question I'm stuck half way:( & 2)(-3+4i)^2 On this question I go

Question 380009: Could someone Please help me!!!
It would be most appreciated:)
Question:
1)(3+sqrt(-16))(4+sqrt(-9)) This question I'm stuck half way:(
&
2)(-3+4i)^2 On this question I got 9+16i but I don't think its right???
Thank you!!!

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
1)(3+sqrt(-16))(4+sqrt(-9))
----------------
= (3+4i)(4+3i)
-----
= 12+ 9i + 16i +12i^2
----
= 12 +25i -12
---
= 25i
==============
2)(-3+4i)^2
---
= (-3+4i)(-3+4i)
---
= 9 -12i -12i +16i^2
-----
= 9 -24i -16
---
= -7-24i
================
Cheers,
Stan H.
RELATED QUESTIONS
How do i go about factoring: sqrt(128) I looked online on how to solve radicals and i... (answered by oscargut)

Please help me with this question! Thanks! Express this fraction with a rational... (answered by josgarithmetic)

I am a bit stuck on these few problems and I can't get any help....Someone please help... (answered by mananth)

Hello, I'm just a little confused by what the following question is asking: What two... (answered by ilana)

will someone pleas check this for me? sqrt{{{9/16}}} =sqrt{{{9}}}/sqrt{{{16}}}... (answered by checkley75)

Hi! My calc teacher gave his students a packet of math review to do over the summer. I am (answered by venugopalramana)

Rationalize the function and give its domain in interval notation {{{ G(X) =... (answered by josgarithmetic)

could someone explain to me how i should siplify sqare roots as such;... (answered by Alan3354)

I am having trouble with this question: 7^sqrt(a^2*b^4) So far I have come up with... (answered by Alan3354)