Which expression is the greatest common factor (gcf) of the terms of trinomial 12x^7y^9 + 6x^4y^7 - 10x^3y^5

 2.  

Step-by-step explanation:

The given expression :

Term 1 :

Term 2 :

Term 3:

Lowest power of x = 3

Thus  , The highest common power of x =   (i)

Lowest power of y = 5

The highest  common power of y = (ii)

Greatest common factor of 12, 6 , -10= 2  [Because 2 is the largest number that divides all of them]   (iii)

From (i) , (ii) , (iii) , we have

Greatest common expression :

Hence, the correct answer is 2.

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2