Question

Factorise 397^2 -387^2 using identity

Answer 1

Step-by-step explanation:

Factorizing we get,

x

2

−40x+39=0

⇒x

2

−39x−x+39=0

⇒x(x−39)−1(x−39)=0

⇒(x−1)(x−39)=0

⇒x=1,39

Answer 2

Answer:

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