the number of zero of the cubic polynomial x cube -3x square - x +3 is
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Answered by
1
Answer:
⇒ x=
3
7
+
3
49
--- [ Given ]
⇒ x
3
=(
3
7
+
3
49
)
3
⇒ x
3
=(
3
7
)
3
+(
3
49
)
3
+3×(7)
1/3
(7)
2/3
(
3
7
+
3
49
)
⇒ x
3
=7+49+3×7(
3
7
+
3
49
)
⇒ x
3
=56+3×(x)
⇒ x
3
=56+3x
⇒ x
3
−3x−56=0
⇒ This gives a cubic polynomial in x and product of roots =56
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