Question

using a square - b square find :
$12.1 {}^{2} - 7.9 {}^{2}$

Answer 1

Hii !!




12.1² - 7.9²






( 12.1 + 7.9 ) ( 12.1 - 7.9 ) [ ( a² + b² ) = ( a + b ) ( a - b ) ]



( 20 × 4.2 )



84 [ Answer ]

Answer 2

hlo,

here is your answer.

( 12.1 + 7.9 ) ( 12.1 - 7.9 )
20 × 4.2
84