Question

Use identity (a-b)=a＾2+b＾2+2 ab to find the square of 49

Answer 1

Answer:

2401

Step-by-step explanation:

49=50-1

sq(49)=sq(50-1)

(50-1)^2=50^2+1^2-2*50*1

            =2500+1-100

            =2401

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