Question

Q 3. One of the factors of x3+8y3-64z3+24xyz is:
(a)x+2y-4z (b)x-2y+4z (c)x+2y+4z (d)x-2y-4z

Answer 1

Answer:

x + 2y - 4z

Step-by-step explanation:

we know if a + b + c = 0 , then a^3 + b ^ 3 + c ^3 = 3abc

( x )^3 + ( 2y ) ^3 + ( - 4) ^3 = - 24xyz  [ so only z is -ve ]

so the ans is x + 2y - 4z