Answer:
X=1, X=3 and X=-1
Step-by-step explanation:
Given the expression (X-1)(X-3)(X+1):
# To find the rational values of X, we equate the equation to zero:
[tex](X-1)(X-3)(X+1)=0\\\\X-1=0 \\\therefore X=1 \ \ \ \ ...i\\\\X-3=0\\\therefore X=3 \ \ \ \ \ ....ii\\\\X+1=0\\\therefore X=-1 \ \ \ \ \ ...iii[/tex]
Hence for the values of X=3,X=1 and X=-1 the expression equal 0
