Question

Evulate the following products without acutal multiplication 51 by 2 into 49 1 by

Answer 1

Step-by-step explanation:

MATHS

Evaluate without actual multiplication.

101×99

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ANSWER

101×99=(100+1)(100−1)

We know suitable identity is (x+y)(x−y)=x

2

−y

2

Therefore, the value of (100+1)(100−1) is

=(100)

2

−(1)

2

=10000−1

=9999