Hello everyone,

this is the exact question

what I have so far is that:

P'(x)= 3ax^3 + 2bx^2 + c

Then from what I understand P'(0)=0

so then:

P'(0)=0=3a0^3 + 2b0^2 + c

so c=0

however from here on I'm stuck. Can you please help me with the rest.

Thanks in advance