If f(x) = x2 – 2x and g(x) = 6x + 4, for which value of x does (f + g)(x) = 0?

 The required value of x is -2.

Step-by-step explanation:  We are given the expressions for two functions f(x) and g(x) as follows :

We are to find the values of x for which (f + g)(x) = 0.

We know that

for any two functions p(x) and q(x),

We have

Thus, the required value of x is -2.

5y

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.