Question

simplify using suitable identity.. 30.9x 29.1

Answer 1

30.9*29.1
=(30+0.1)(30-0.1)                 [(a+b)(a-b)=a²-b²]
=30²-0.1²
=900-0.01
=899.99
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Answer 2

Answer:

Step-by-step explanation:

Using Identity III

(30+0.9)(30-0.9)

(30)*2 -(0.9)*2

900-0.81

899.19(ans.)