Question

Find the product using identity.



862-142 here both the 2 are square eg 86 ka square and 14 ka square ​

Answer 1

Step-by-step explanation:

Decomposing the given number,

⇒  999=1000−1             ---- ( 1 )

Here, a=1000 and b=1

Squaring both the sides of ( 1 ),

⇒  (999)2=(1000−1)2

                   =(1000)2−2(1000)(1)+(1)2           [ (a−b)2=a2−2ab+b2 ]

                   =1000000−2000+1

                   =998001

∴  (999)2=998001