(7x+3y) (7x-3y) tell the answer – InterviewSolution

1.

(7x+3y) (7x-3y) tell the answer

Answer»

= 49x^2 - 9y^2

Step-by-step EXPLANATION:

= (7X+3Y) (7x-3y)

= 7x (7x-3y) + 3y (7x -3y)

= 49x^2 - 21XY + 21xy - 9y^2

= 49x^2 - 9y^2

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