Question

find the following product of : 4.5*5.5

Answer 1

4.5 × 5.5 = 24.75 .........

Answer 2

Solution :

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We know the algebraic identity:

( x - y )( x + y ) = x² - y²

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Here ,

4.5 × 5.5

= ( 5 - 0.5 )( 5 + 0.5 )

= 5² - ( 0.5 )²

= 25 - 0.25

= 24.75

Or

= 24 3/4

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