Why are there two ways we can measure energy food (KJ or CAL), what is the reason for this and why? detailed, please

Step-by-step explanation:

KJ ( kilo Joule) , this is the unit of Energy. Usually for measuring common energy.

CAL (calorie), this is the unit of Heat Energy.

calories are usually used for those related to food or human activities.

the conversion value :

1 Joule = 0.24 Calorie

1 Calorie = 4.2 Joule

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

answer: your correct answer is b. d.

step-by-step explanation: