Question

calculate 99×99 with indentity 2.​

Answer 1

Answer:

99*99 = (99)^2 = (100-1)^2 = (100)^2 -2*100*1 + 1^2

= 10000 - 200 + 1 = 9801. (Ans)

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

Answer 2

Answer:

(99)

2

=(100−1)

2

(100−1)

2

is of the form (a−b)

2

=a

2

+b

2

−2ab where a=100,b=1

∴(100−1)

2

=100

2

+1

2

−2×100×1

=10000+1−200=10000−199=9801

Step-by-step explanation:

it can help you

mark me as brainlist.......plese