Answer:
a = 5, b = -12
Step-by-step explanation:
By basic factoring, you get 9 - 12i +
. Since
is simply -1, the expression evaluates to 9 - 12i - 4, which is 5 - 12i.
71/20 is not in simplest form because you need to change it into a mixed number by dividing 71 and 20 and putting the remainder over 20.
The law of cosines states that, if
is the angle between sides b and c,

So, plugging our values, we have

This is equal to

Answer:
Step-by-step explanation:
Answer:
true
Step-by-step explanation: