Question

The value of (81)2

- (80)2

is​

Answer 1

Step-by-step explanation:

$(81)^{2}$-$(80)^{2}$

= (81+80)(81-80)         [∵ $a^{2}-b^{2} = (a+b)(a-b)$]

= 161 × 1

= 161 (Ans)

Answer 2

Answer: 161

Step-by-step explanation:

First: (a+b)(a-b) so (81+80)(81-80)

Then, (161)(1), so 161x1=161