Question

Write the coefficients of x² in each of the following 1) 2+x²+x 2) 2-x²+x³

Answer 1

(1) 1 (2) 0

Explanation:

Looking at 1) 2+x²+x;

The coefficient of x is 1 because we see +x in the express which is the same as 1 × x = x.

2) Looking at 2) 2-x²+x³

There is no expression with x but we have x^2 , x^3 . Hence the coefficient of x is 0 because 0×x =0

Answer 2

1) 1 and 2) -1

Explanation:

1) 2+x²+x

• +x² ⇒ coefficient of x² is 1

2) 2-x²+x³

• -x² ⇒ coefficient of x² is -1