Which is the integer root of the function f (x) = (2x + 4) (3x - 1) ?

The integer root of this function is - 2: Here's how you can solve.

Set each binomial equal to zero and solve:

2x + 4 = 0 subtract 4 from both sides

2x = - 4 divide both sides by 2

x = - 2

Setting the other binomial equal to 0 yields a fractional root ... try for yourself : - )