Question

how may i integrate functions that have root 2,3,4 ?

Answer 1

if they have roots 2, 3, 4 that means

x = 2
x = 3
x = 4

so your factors are

\[\int (x - 2)(x - 3)(x-4) dx\]

expand then it should be simple enough..

Answer 2

that is if "roots" dont have different meaning for integrals..