Question 65544
Given that (3x-a)(x-2)(x-7)=3x^3-32x^2+81x-70, determine the value of a... 
HELP!
THERE ARE 2 WAYS TO DO THIS.
1.NORMAL WAY IS TO MULTIPLY AND EQUATE THE 2 SIDES TO GET A. BUT EVEN HERE YOU CAN COMPARE ONLY THE CONSTANT TERMS AND GET THE ANSWER IN AN EASY WAY.
2.BUT EASIER WAY IS TO USE THE POWER OF IDENTITY AS AGAINST AN EQN. HOPE YOU KNOW THE DIFFERENCE BETWEEN THE TWO.
THIS BEING AN IDENTITY IN X IT IS TRUE FOR ANY AND EVERY VALUE OF X.SO PUT X=0 
WE GET 
(-A)*(-2)(-7)= -70
-14A=-70
A=(-70)/(-14)=5