Question

Evaluate the (99)²

using suitable identitis​

Answer 1

Answer:

${(100 - 1)}^{2} \\ {100}^{2} - 2 \times 100 \times 1 + {1}^{2} \\ 10000 - 200 + 1 \\ = > 9801|$

Answer 2

Answer:

Step-by-step explanation:

this is the simplest method of calculating square

=99²

round of and minus the amount rounded

99 to 100

=99+1=100

=99-1=98

=100*98

=9800

you first added and subtracted 1 right?

so find the square of 1 = 1

so 9800+1=9801

hence proved in simple method