SOLUTION: Perform the indicated operations. State your answer in a+bi format. a.) (2+i)- squrt negative 64. b.) -4i^13+7i^6 c.) (4-i)(3+5i) Mostly a&b but just in case c please.

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Perform the indicated operations. State your answer in a+bi format. a.) (2+i)- squrt negative 64. b.) -4i^13+7i^6 c.) (4-i)(3+5i) Mostly a&b but just in case c please.       Log On


   



Question 1057502: Perform the indicated operations. State your answer in a+bi format.
a.) (2+i)- squrt negative 64.
b.) -4i^13+7i^6
c.) (4-i)(3+5i)
Mostly a&b but just in case c please. I just don't recall the proper way to state my answer in the format. The teacher is really strict on work and I don't have all the steps down.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
(a)
+%28+2+%2B+i+%29+-+sqrt%28-64%29+
+%28+2+%2B+i+%29+-+sqrt%2864%29%2Asqrt%28-1%29+
+%28+2+%2B+i+%29+-+8i+
+2+-+7i+
-----------------------
(b)
+-4%2Ai%5E13+%2B+7%2Ai%5E6+
( note that +i%5E2+=+-1+ and +i%5E4+=+1+ )
+-4%2A%28+i%5E4%29%5E3%2Ai+%2B+7%2A%28+i%5E4+%29%2Ai%5E2+
+-4%2A1%5E3%2Ai+%2B+7%2A1%2A%28-1%29+
+-4i+-+7+
+-7+-+4i+
--------------------
(c)
+%28+4+-+i+%29%2A%28+3+%2B+5i+%29+
+12+-+3i+%2B+20i+-+5%2Ai%5E2+
+12+%2B+17i+-+5%2A%28-1%29+
+12+%2B+5+%2B+17i+
+17+%2B+17i+
-------------------------
You might want a 2nd opinion on these
check my work