Math, asked by devrahul777999, 7 months ago

$( 12.1) { }^{2} - 7.9 {?}^{2}$

Answers

Answered by ritachow

3

Answer:

(12.1)^2-(7.9)^2

= (12.1+7.9) (12.1-7.9)

= 20* 4.2

=84

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