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Byju's Answer
Standard IX
Mathematics
Zeroes of a Polynomial
Verify whethe...
Question
Verify whether
x
=
3
is a zero of the polynomial
x
2
+
2
x
−
15
.
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Solution
Given polynomial
x
2
+
2
x
−
15
To verify:
x
=
3
is a zero of the given polynomial
Solution
Consider
x
2
+
2
x
−
15
substitute
x
=
3
in the above equation
(
3
)
2
+
2
(
3
)
−
15
⇒
9
+
2
(
3
)
−
15
⇒
9
+
6
−
15
⇒
15
−
15
⇒
0
Thus,
x
=
3
is a zero of the polynomial
x
2
+
2
x
−
15
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