Question

Please solve the question no. 42 ​

Answer 1

using formula :-

=> ( a + b ) ( a - b ) = ( a - b )²

Where , a = x² + x

b = 1

=> [ a + b ] [ a - b ]

[ ( x² + x ) + ( 1 ) ] [ ( x² + x ) - ( 1 ) ]

[ ( x² + x - 1 ) ] ²

( x² + x - 1 )²

I hope this will be help you