Answer: There are two roots: 2 and 6.
Step-by-step explanation: Roots are the same thing as zeros, and zeros are your x-intercepts. Using Desmos.com and plugging in your equation, you can find that the equation intersects the graph at two points. Desmos is a lifesaver! you can check your answers by plugging in each root into x and solving.
f(2)=0.1(2)^3 - 1.4(2)^2 +6(2) -7.2
f(2)=0.8 - 5.6 +12 - 7.2
f(2) = 0
f(6)=0.1(6)^3 - 1.4(6)^2 +6(6) -7.2
f(6)=21.6 - 50.4 +36 -7.2
f(6) = 0
