Not so difficulty. Keep calm and try it
Algebra
Level
3
THE EXPRESSION A S SHOWN IN THE PIC IS ALWAYS DIVISIBLE BY?????
3
7
5
NONE OF THESE
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1 solution
assume p,q belongs to set of numbers(3x+1,3y+2)the putting the value in the condition we get by binomial expansion that a+b+c is divisible by 3....so a a a+b b b+c c c=(a+b+c)(a a+b b+c*c-ab-bc-ca)+3abc.....hence the expression is divisible by 3..........................