Question

the area of the region between the graph of y 3x^2+2x [1,3]

Answer 1

you will need to integrate

Answer 2

Say we have this
we want to find the area between y=f(x) and y=0 and x=a and x=b.

To do you do :
\[\int\limits_{a}^{b}(f(x)-0)dx\]