Question

Without actual Squaring find the value of (51)*(51)-(50)*(50)
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Answer 1

Answer:

Step-by-step explanation:

write 51 as (50+1)

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

= (50^2 + 2*50*1 + 1^2) - 50^2         #expand using (a+b)^2

= 2*50*1 +1

= 101