If a= 2 and b= 7 , find the value of 3a^3 - 3b^2 +4ab.

Let E= 3a^3 - 3b^2 + 4ab

We
need to find the value of E such that a=2 and b= 7

Then, we
will substitute with the values of a and b into the
expression.

==> E = 3*(2^3) - 3*(7^2) +
4*2*7

Let us calculate the
value.

First we will calculate the
exponents.

==> E = 3*(8) - 3*(49) +
4*2*7

Now we will
multiply.

==> E = 24 - 147 +
56

Now we will add and
subtract.

==> E =
-67

Then the value of 3a^3 - 3b^2 + 4ab =
(-67).