factorise x^3+3x^2- 13x- 15
Answers
Answered by
0
Answer:
x
+
1
)
(
x
2
+
2
x
−
15
)
Factor
x
2
+
2
x
−
15
using the AC method.
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f
(
x
)
=
(
x
+
1
)
(
x
−
3
)
(
x
+
5
)
Answered by
1
Answer:
By hit-trial method we get,
(x + 1) is factor of this polynomial.
So by dividing (x + 1) with polynomial we get that,
(x - 3)(x + 5) is also factor of this polynomial.
∴ Factor of this polynomial are (x - 3),(x + 5),(x + 1)
∴ Values of x = 3 , -5 , -1
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