If\ the\ polynomial\ p\left(x\right)\ =\ 2x^3\ +\ ax^{2\ }-\ 7x\ +b,\ p\left(1\right)\ =\ 3\ and\ p\left(2\right)\ =\ 19,\ find\ a\ \&\ b pls tell fast

Value of a =3

Value of b =5

Step-by-step explanation:

We are given p(1)=3 and p(2)=19

Putting x =1 to find p(1)

Now putting x=2 as p(2)=19

Solving these equations to find values of a and b

Subtract both equations

So, value of a =3

Now finding value of b bu putting value of a in equation 1

So, Value of b =5