Question

Using the identity (a-b) square = (a square - 2ab + b square), Evaluate 699 square

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

using identity ( a-b)^2 = a^2 +2ab+b^2

(699 )^2

(700-1)^2

here a= 700, b= (-1)

(700)^2+ 2(700)(-1)+ (-1)^2

490000+(-1400)+(1)

arranging like terms

490000+1- 1400

490001-1400

488601

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