divide-(x3+27)by(x+3)plz help
Answers
Answered by
2
Answer:
x+9
Step-by-step explanation:
(x3+ 27 ) (x+3)
divide this all by 3
you get your answer
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Answered by
6
Answer:
Use the formula for the difference of two cubes to factor the top and cancel the
x
−
3
to get
x
2
+
3
x
+
9
Explanation:
The formula for the difference of two cubes is
a
3
−
b
3
=
(
a
−
b
)
(
a
2
+
a
b
+
b
2
)
(check this by expanding out the right side).
Thus, since
x
3
−
27
=
x
3
−
3
3
,
x
3
−
27
x
−
3
=
(
x
−
3
)
(
x
2
+
3
x
+
9
)
x
−
3
=
(
x
−
3
)
(
x
2
+
3
x
+
9
)
x
−
3
=
x
2
+
3
x
+
9
This last equality is true as long as
x
≠
3
.
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the answer is in the vertical but this is the right answer
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