Question

42. Using the identities, evaluate the following:
1) 812
(v) 6.12
(ii) 972
(0i) 496 x 504
(iii) 1052
(vii) 20.5 x 19.5
(iv) 9972
(viii) 9.62​

Answer 1

Answer:

496×504

= (500−4)(500+4) [Using, (a+b)(a−b)=a

2

−b

2

]

= (500)

2

−(4)

2

= 250000−16

= 249984