Question

Without actual squaring find the value of 22sq-21sq

Answer 1

Step-by-step explanation:

given 22^2-21^2

we know (a^2-b^2)= (a+b)(a-b)

=>(22+21)*(22-21)

=>(43)*(1)

=43

so the value of 22^2-21^2 is 43

Answer 2

Answer:

Given =22sq.-21sq.

a sq. - b sq. = (a+b) *(a-b)

22+21*22-21=

43*1

43 ANS.

Step-by-step explanation:

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