Question

Find the product of the following by using suitable identities: (7x^2+9) (7x^2-9)
PLEASE ANSWER ME TO RANK PUSH

Answer 1

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Answer:

we know the formula

(a+b)(a-b) = a^2 - b^2

so,

(7x^2+9)(7x^2-9) = (7x^2)^2 - (9)^2

= 49x^4 - 81

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Answer 2

Step-by-step explanation:

(a+b) (a-b)= a^2- b^2

7x^2+9) (7x^2-9)= (7×^2)^2 - 9^2

49x^4-81