Question

((893+786)^2-(893-786)^2)/(893*786)

Answer 1

Step-by-step explanation:

(a+b)^2 – (a-b)^2

= (a^2 + b^2 + 2ab) – (a^2 + b^2 – 2ab)

= a^2 + b^2 + 2ab – a^2 –b^2 + 2ab

= 4ab

Here a= 893 and b= 786

So

((893+786)^2–(893–786)^2)/(893*786)

=4*896*787

896*787

=4

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Answer 2

Answer:

Step-by-step explanation:

By using this identity,

= [a+b]^2 - [a-b]^2 / ab              

= 4ab / ab

= 4

We get,

= [893 + 786]^2 - [893 - 786]^2 / 893 x 786

= 4 [893 x786] / 893 x 786

= 4