Answer:
Step-by-step explanation:
Here is my answer. I left the latter question in a. as I don't actually know the answer. Anyway, I hope this is helpful although not complete.
Take the first 2 and take out -7x2. bringing it to (-7x2)(x-3)+(3x-9)
then take out 3 on the right side.
-7x^2 (x-3)+3 (x-3)
factors to (3-7x2)(x-3)
Answer:
y
=
9
x
2
−
4
y
=
9
x
2
-
4
Interchange the variables.
x
=
9
y
2
−
4
x
=
9
y
2
-
4
Solve for
y
y
.
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y
=
√
x
+
4
3
y
=
x
+
4
3
y
=
−
√
x
+
4
3
y
=
-
x
+
4
3
Solve for
y
y
and replace with
f
−
1
(
x
)
f
-
1
(
x
)
.
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f
−
1
(
x
)
=
√
x
+
4
3
,
−
√
x
+
4
3
f
-
1
(
x
)
=
x
+
4
3
,
-
x
+
4
3
Step-by-step explanation:
Answer:
(B): (x - 2)/(x + 1)
Step-by-step explanation:
The numerator is x^2 + 5x - 14. That is equal to (x - 2)(x + 7).
The denominator is x^2 + 8x + 7. That is equal to (x + 1)(x + 7).
You can then eliminate (x+7) to get (x - 2)/(x + 1).
