Question

By using the identity of (a-b)^2=a^2+b^2-2×a×b evaluate (17.6-12.4)^2​

Answer 1

Step-by-step explanation:

Given (196)

2

We have (a−b)

2

=(a

2

−2ab+b

2

)

(196)

2

can be written as 200−4

So here a=200 and b=4

Using the formula,

(200−4)

2

=(200

2

−2×200×4+4

2

)

On simplifying we get

(200−4)

2

=(40000−1600+16)

(196)

2

=38416

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