Which of the following identity is applicable to simplify (4x + 5y)^2 - (5x + 4y)^2 ?

= + 2ab +

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- = (a + b)(a - b)

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= - 2ab +

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Both A and B

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Solution

The correct option is C
= - 2ab +

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Similar questions

Which of the following identities is not applicable to simplify
$(4 x + 5 y)^{2}$ - $(5 x + 4 y)^{2}$ ?

Which of the following identity is not applicable to simplify ${(4 x + 5 y)}^{2} - {(5 x + 4 y)}^{2}$ ?

(4 x - 2 y) (5 x + 4 y) - (3 x^{2} + 2 y^{2})

4 (x + 2) + 5 (y + 2) = 20

5 x + 4 y = 7

A = (5, 0)

B = (0, 4)

P

| P A |^{2} - | P B |^{2} = 9

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