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aniked [119]
3 years ago
7

Evaluate using suitable identity:d). 9.9²​

Mathematics
2 answers:
mel-nik [20]3 years ago
6 0

Step-by-step explanation:

9.9²

(10-0.1)²

= 10² -2 (10) (0.1) + 0.1²

= 100 -2 + 0.01

= 98.01

Hope it helps you

Sholpan [36]3 years ago
6 0

Answer:

<h3><u>★ Solution :-</u></h3>

\sf \longmapsto 9.9^2

\sf \longmapsto (a - b)^2 = a^2 - 2ab + b^2

Here,

  • a = 10
  • b = 0.1

\sf \longmapsto (10 - 0.1)^2 = 10^2 - 2(10)(0.1) + 0.1^2

\sf \longmapsto 10^2 - 2(10)(0.1) + 0.1^2

\sf \longmapsto 100 - 2 + 0.01

\sf \longmapsto 98.01

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