Question

what should be added to 7square+1 square to get (7+1)square​

Answer 1

Answer:

7^2+1^2+2^2+3^2=(7+1)^2

Answer 2

Answer:

14

Step-by-step explanation:

If you apply the identity

(a+b)^²=a^²+b^²+2ab

(7+1)^²=7^²+1^²+2(7)(1)

As it is asked to find

(7+1)^²-7^²-1^²

it will be 2(7)(1)

which is 14 .

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