1.

18a²-50, Factorise it using appropriate identities.

Answer»

Solution :

GIVEN 18a² - 50

= 2( 9a² - 25 )

= 2 [ ( 3A )² - 5² ]

= 2( 3a + 5 )( 3a -5 )

[ SINCE , x² - y² = ( X + y )( x - y ) ]

••••

Therefore ,

18



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