Question

find the product of (3x-1)(3x+1)(9xsquare+1) using suitable identity​

Answer 1

Answer:

(3x-1)(3x+1)(9x²+1)

{(3x)²-(1)²}(9x²+1)._______(a²-b²) = (a-b)(a+b)

{(3x)²-(1)²}{(3x)²+(1)²}_______(a²-b²) = (a-b)(a+b)

(9x²-1)(9x²+1)

{(9x²)²-1}