Question

Factorise:-
1) x² -1+3x³-3x​

Answer 1

Answer:

given x²-1+3x³-3

now arrange in the order

⇒3x³+x²-3x-1

taking common in the above equation

⇒x²[3x+1]-1[3x+1]=0

⇒[x²-1] [3x+1]=0

⇒x²-1=0       ;        3x+1=0

⇒x²=1          ;        3x=-1

⇒x=±√1       ;       3x=-1

⇒x=±1          ;        x=-1/3

∴x=1,-1,-1/3