Question

please give the ans plz plz

Answer 1

$72 {z}^{2} - 45z + 4 - (30z - 42 {z}^{2} - 17) \\ = 72 {z}^{2} + 42 {z}^{2} - 45z - 30z + 4 + 17 \\ 114 {z}^{2} - 75z + 21$
so 72z2-45z+4 is greater by 114z2-75z+21