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Q.

If p(x) = (x - 3)(x + 5) and p(x) = 0 then roots of p(x) are 

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a

-3, 5

b

3, 5

c

3, -5

d

-3, -5

answer is A.

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Detailed Solution

detailed_solution_thumbnail

Here, p(x) = 0 and p(x) = (x - 3)(x + 5)

Therefore, (x - 3)(x + 5) = 0

i.e. (x - 3) = 0 or (x + 5) = 0

therefore, 

(x - 3) = 0 --> x = 3 & (x + 5) = 0 --> x = -5

Therefore, 3 & -5 are roots of given equation

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