Math, asked by Anonymous, 1 year ago

evaluate, using suitable identity: 1) 2.07*1.93​

Answers

Answered by OkuraZeus
24

Answer:

3.9951

Step-by-step explanation:

(2 + 0.07)(2 - 0.07)

= (2^2) - (0.07^2)

= 4 - (49 × 0.0001)

= 4 - 0.0049

= 3.9951

Answered by Swarup1998
5

2.07\times 1.93=3.9951

Concept :

Let us know an algebraic identity before we solve the problem. If a and b be two numbers such that a>b, then we have the following identity:

\quad a^{2}-b^{2}=(a+b)(a-b)

Step-by-step explanation:

We write:

  • 2.07=2+0.07
  • 1.93=2-0.07

So, 2.07\times 1.93

=(2+0.07)\times (2-0.07)

  • Now we apply the identity written in the Concept part of this answer.

=(2)^{2}-(0.07)^{2}

=4-0.0049

=3.9951

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