Question

(9.9)^2 using suitable identity evolute it​

Answer 1

Answer:

hii

your answer is here !

Step-by-step explanation:

9.9 can also be written as( 10-0.1)

(9.9)² = (10-0.1)²

using the formula: (a-b)² = a²+ b² -2ab

(10-0.1)² = 100+0.01- 2(2*10*0.1)

= 98.01

$follow \: \: \: \: \: me$

Answer 2

Answer:

98.01 is the answer. Identity and Solution is given below.

Step-by-step explanation:

$={(9.9)}^2$

$={(10-0.1)}^2$

${(a-b)}^2={a}^2-2ab+{b}^2$

$={(10)}^2-2(10)(0.1)+{(0.1)}^2$

$=100-2+0.01$

$=98+0.01$

$=98.01$