Question

Calculate 99×99 with indentity 2. whole answer point by point​

Answer 1

Answer:

9801

Step-by-step explanation:

99= 100-1

99 ×99

(100-1)×(100-1)

(100-1)^2 (a-b)^2=a^2-2ab+b^2

(100)^2 - 2(100)(1) + (1)^2

10000-200+1

=9801