Answer:
Step-by-step explanation: x can be 3, -3, i, or -i.
Explanation:
If you can't find the factoring by looking at this, simplify the equation.
let
x
2
=
y
to make things easier to see
Now we have
y
2
−
8
y
−
9
=
0
See it now?
We can factor into
(
y
−
9
)
(
y
+
1
)
Now substitute back in
x
2
for
y
.
(
x
2
−
9
)
(
x
2
+
1
)
Since
(
x
2
−
9
)
is a difference of two squares,
(
x
−
3
)
(
x
+
3
)
Now we have
(
x
−
3
)
(
x
+
3
)
(
x
2
+
1
)
x can be 3, -3 for the first two parts
x
2
+
1
=
0
can become
x
2
=
−
1
Taking the positive and negative root means
x
=
±
√
−
1
Thus
x
=
±
i
in addition to 3 and -3.
Here is my answer, I'm sorry if you didn't understand my explanation
Answer:
v = 
/2
u = 
/2
Step-by-step explanation:
is across from the 60 degree angle so the side across from 30 degrees is half that
the hypotenuse is the product of the side opposite 30 degrees and 
so:
× /2 = /2
Answer:
742.5625
Step-by-step explanation:
Square root of 111 is 27.75 so mulitply both and get 742.5625
Answer:
-34.8-(-79.8)=79.8-34.8=45.8
