Write the coefficients of x2 in each of the following

Write the coefficients of x2 in each of the following:
(i) 2 + x² + x   (ii) 2 – x² + x³             (iii) (pi/2 )x²+ x           (iv) √2x – 1
Solution: (i) 2 + x² + x  
Coefficient if x² = 1
(ii) 2 – x² + x³            
Coefficient of x²  = -1

(iii) (pi/2 )x²+ x
Coefficient of x²  = pi/2
(iv) √2x – 1
There are no x² term so Coefficient of x²  = 0