Question

.

Answer 1

plug in

Answer 2

x^2-3X+2 =0
X^2-2X-X+2=0
X(X-2)-1(X-2)=0
(X-2)(X-1)=0
hence r=2 is root

Answer 3

and the last one is false?

Answer 4

yes

Answer 5

if u want to verify just substitute value in the equation[for example: put r=2 in eqn(1)], if it is a root then the result will be zero(0).

Answer 6

oh ok but i tried it and it states false.

Answer 7

first true

second false