The average of the polynomials, 2×2 + 5x -6, 5×2 – 5x – 6 and 30 – 7×2 is:

The average of the polynomials, 2x2 + 5x -6, 5x2 – 5x – 6 and 30 – 7x2 is:

(A) 14
(B) 6
(C) 18
(D) 5x

Answer: (B) 6

Solution:

First, we find the sum of the three polynomials, than divide the answer by 3.
Sum of the three polynomials

2x2 + 5x – 6
5x2 – 5x – 6
-7x2 + 30 / 18

Now, Average = Sum of the three polynomials / 3

= 18 / 3 = 6

so. the answer is 6.

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