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Q.

Find the zeroes of the polynomial 3x2 – 75.

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a

4, -4

b

5, -5

c

6, -6

d

7, -7

answer is B.

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Detailed Solution

Given: p(x) = 3x2 – 75
To find zeroes, let p(x) = 0.
3x2 – 75 = 0
⇒ 3(x2 – 25) = 0
⇒ (x – 5)(x + 5) = 0

⇒ x – 5 = 0 or x + 5 = 0

⇒ x = 5 or x = –5

Therefore, the zeroes of the polynomial are 5 and –5.

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