Q. 10 A4.3( 10 Votes )

# Find the product:

First solving (x – 3)(x + 3)

Using the identity (a +b) (a–b) = a2 – b2

Here a = x and b = 3

= x2 –32

= x2 – 9

Now (x2 – 9) (x2 + 9)

Again, using the identity (a +b) (a–b) = a2 – b2

Here a = x2 and b = 9

= (x2)2 – 92

= x4 –81 ( (ax)m = axm)

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