The quadratic formula works whether the coefficients of the equation are real or complex. Solve the following equations using th
e quadratic formula and, if necessary, De Moivre's Theorem. (Enter your answers as a comma-separated list.)
z2 − 2iz − 5 = 0
1 answer:
Answer:
z=i+2
,
z=i-2
Step-by-step explanation:
Remember that the quadratic equation
has the complex solutions
(this is the quadratic formula).
Apply this with a=1, b=-2i and c=-5 to get:
. Then the solutions are
and 
It isn't necessary to use De Moivre's formula.
You might be interested in
Answer:
125
Step-by-step explanation:
500*0.25=500*1/4
Solve
500*1/4
=500/4
=125
Answer:
-63
Step-by-step explanation:
Answer:
i
Step-by-step explanation:
dontkow
A. radical 76 is8.6 so false
B. 3 radical 10 is 9.4 true
C. 4 radical 2 is 5.6 so false
D. radical 29 is 5.3 so true
E. 2 radical 50 is 14.14 so false
Answer:
1/15
Step-by-step explanation:
You have a 1/3 chance of being an elf.
You have a 1/5 change of having the magic tool.
1/3 × 1/5 = 1×1/3×5 = 1/15