Question

Solve the function.
Plz Help!!

Answer 1

`1\pm√(2)i`

Explanation:

We already know that one of the roots is x = -4 so we can factor this out to get

`x^3+2x^2-5x+12=(x+4)(x^2-2x+3)`

Using the quadratic equation on the 2nd factor, we find the roots are

`x= (2\pm√((2)^2 - 4(1)(3)))/(2)=1\pm√(2)i`