Question

Factorise : (x2 – 3x) (x2 – 3x - 1) - 20.​

Answer 1

Hey Mate , Your Answer Is In The Attachment ..

Answer 2

Answer:

( x² - 3x - 5 ) ( x² - 3x + 4 )

Step-by-step explanation:

here,( x² - 3x ) ( x² - 3x - 1 ) - 20

Let a = x² - 3x ---( 1 )

Now , the expression becomes ,

a( a - 1 ) - 20

= a² - a - 20

= a² - 5a + 4a - 20

= a( a - 5 ) + 4( a - 5 )

= ( a - 5 ) ( a + 4 )

= ( x² - 3x - 5 ) ( x² - 3x + 4 )                   [ from ( 1 ) ]

I hope this helps you.