What are the zeros of the function? f(x)=x3+4x2−12x

The solutions are:

 and  and

Step-by-step explanation:

1) Make the function equal to zero

2) Take x as a common factor

3) Factor the expression

The sought-after factors are such numbers that when multiplying them obtain as result -12 and when adding both numbers obtain as result 4.

The numbers that meet this condition are

6 and -2

Because

Then the factors are

4) Solve the equation for x

The solutions are:

 and  and

answer:

42

10 + 10 + 10 + 10 = 10 x 4 = 40

40 + 2