How do I use the factor theorem to prove #x-2# must be a factor of #2x^3-x^2-7x+2#?
1 Answer
Mar 17, 2018
Explanation:
#"for a polynomial "f(x)#
#• " if "f(a)=0" then "(x-a)" is a factor of "f(x)#
#"substitute "x=2 " into the polynomial"#
#rArr2(2)^3-(2)^2-7(2)+2=0#
#rArr(x-2)" is a factor of "2x^3-x^2-7x+2#
