Polynomial

Verify that (i) 3 is a zero of the polynomial x-5. (ii) -2 is a zero of the polynomial x+2. (iii) (7)/(3) is a zero of the polynomial 3x-7. (iv) 2 and 3 are zeros of the polynomial (x-2)(x-3). (v) (13)/(2) and -3 are zeros of the polynomial 2x^(2)-7x-39 .