4.2 x 4.2

Answer: Option B Given Expression = ( a 2 - b 2 ) = ( a 2 - b 2 ) = 1. ( a + b )( a - b ) ( a 2 - b 2 )

Question

4.2 x 4.2 - 1.9 x 1.9 is equal to: 2.3 x 6.1

Options:

A . 0.5

B . 1.0

C . 20

D . 22

Answer: Option B

Given Expression = (a² - b²) = (a² - b²) = 1. (a + b)(a - b) (a² - b²)

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