Question

The factorisation of x² – 9 is
(a) (x – 3)²
(b) (x + 3)²
(c) (x + 3)(x – 3)
(d) none of these.​

Answer 1

Answer:

(x+3) (x-3)

Step-by-step explanation:

let's see the question

• it says x²-9
• here x is the root of x²
• so the root of 9 is ±3 or in simple words +3 and -3 are the roots of 9
• so x²-9 becomes
• (x-3) (x+3) by using the identity
• a²-b²=(a+b) (a-b)

hence the correct ans is (c) (x+3)(x-3)

hope it helps you

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