Question

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Answer 1

Answer:

+3 and -3 are the roots of given equation.

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

x²-9 can be factorised as

(x-3)(x+3) since it is of the form (a²-b²)

equating to zero (to find their zeroes)

x - 3 = 0

x = 3

Or

x + 3 = 0

x= -3

Therefore roots of (x²-9) is ±3