Answer:
-3
Step-by-step explanation:
Answer:
-12
Step-by-step explanation:
Convert the mixed number to an improper fraction.
-2
= 
To divide, just multiply by the reciprocal.
So -2
÷
becomes
÷
Now you can multiply straight across.
×
= 
And simplify.
= -12
Please mark as Brainliest! :)
The answer is 6
hope this helped
Answer:
roots : 4, -4, i, -i
Step-by-step explanation:
This gets a bit tricky.
We have to substitude x^2 as u in this problem.
Now to rewrite x^4 − 15x^2 − 16 = 0 with u, we get
u^2 - 15u - 16 = 0
( u - 16) (u + 1)
U = 16
U = -1
<em>This is not the end of the problem. </em>
Now we have to substitute x^2 back to u.
x^2 = 16 --> we get the roots 4 and -4
x^2 = -1 --> we get the roots i and -i
tadah!