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

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> 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      Log On


   

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) About Me  (Show Source):
You can put this solution on YOUR website!
1)(3+sqrt(-16))(4+sqrt(-9))
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= (3+4i)(4+3i)
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= 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.