Question

simplify (7d+9e) (7d-9e)​

Answer 1

Step-by-step explanation:

((7d)^2)-((9e)^2)

49d^2-81e^2

Answer 2

Question :- simplify (7d+9e) (7d-9e) ?

Solution :- (7d+9e) (7d-9e)

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

:. (7d+9e) (7d-9e) = 7d^2 - 9e^2 = (7d - 9e) ^2

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