Question

find the product
(x – 4)(x+4)
(9a+10b)(9a-10b)
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Answer 1

(x-4)(x+4)=x^2-16

(9a+10b)(9a-10b)=81a^2-100b^2

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Answer 2

Step-by-step explanation:

( x-4 ) (X+4) (9a+ 10b) (9a-10b)

(x^2-4^2) ( 9a^2 -10b^2) (because ( a+b ) (a-b ) =a^2-b^2 )

(x^2-16 ) (81a^2-100b^2)

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