Question

Choose the missing exponent to create a polynomial?

3x^4+4x^2-9x^-?+2
1) 2
2)3
3)-9
4)7
5)4

Answer 1

The answer is -9.

Explanation:

I got it correct on the Math Nation Quiz

Answer 2

3.

The answers 2 and 4 are incorrect because inserting that ad the missing exponent would create only a trinomial.

-9 is incorrect as it would create something more than a polynomial. 7 is incorrect as, if doing a certain type of division, would result in a larger polynomial.

Hope this helps!