y=3x2 + 5x - 3
dy/dx = 6x + 5
as dy/dx = 0
6x + 5 = 0
x = −56
Maximum value: 3 2−56 + 5 −56 - 3
3 7536 - 256 - 3
Using the L.C.M. 36
= 25−50−3636
= −6136
No correct option