Find the suitable identity to find the product of (x-1) (x+1) (x^2+1) 2. ( 2x-3y) (2x+3y) (4x^2 +9y^2)
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for the first sum
(x-1)(x+1)(x^2+1)
(x^2-1^2)(x^2+1^2) [as a+b*a-b=a^2-b^2]
again by this formula we get ,
x^4-1^4 [as by the same formula a+b*a-b=a^2-b^2]
therefore x^4-1^4 is the answer
for the second sum
(2x-3y)(2x+3y)(4x^2+9y^2)
(4x^2-9y^2 )(4x^2+9y^2) [as by a+b*a-b=a^2-b^2]
again by the same formula we get ,
16x^4-81y^4 [as by the same formula a+b*a-b=a^2-b^2]
therefore answer is 16x^4-81y^4
(x-1)(x+1)(x^2+1)
(x^2-1^2)(x^2+1^2) [as a+b*a-b=a^2-b^2]
again by this formula we get ,
x^4-1^4 [as by the same formula a+b*a-b=a^2-b^2]
therefore x^4-1^4 is the answer
for the second sum
(2x-3y)(2x+3y)(4x^2+9y^2)
(4x^2-9y^2 )(4x^2+9y^2) [as by a+b*a-b=a^2-b^2]
again by the same formula we get ,
16x^4-81y^4 [as by the same formula a+b*a-b=a^2-b^2]
therefore answer is 16x^4-81y^4
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