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Question

Verify whether x=3 is a zero of the polynomial x2+2x15.

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Solution

Given polynomial x2+2x15
To verify: x=3 is a zero of the given polynomial
Solution
Consider
x2+2x15
substitute x=3 in the above equation
(3)2+2(3)15
9+2(3)15
9+615
1515
0
Thus, x=3 is a zero of the polynomial x2+2x15

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