Write the coefficient of x2 in each of the following:
(i) 17 – 2x + 7x2
(ii) 9-12x+x3
(iii) x2 – 3x + 4
(iv) x-7
Coefficient of x2 in:
(i) 17 – 2x + 7x2 is 7
(ii) 9-12x+x3 is 0
(iii) x2 – 3x + 4 is
(iv) x-7 is 0