Which pair of these numbers has 20 as a common factor?
2 and 3
2 and 6
20 and 40

20 and 40

Step-by-step explanation:

3x7 is 21 but thats only one too much it has to be 3 too much to go down one and be a factor

6x4 is 24 it has to be 6 too much to go down one to be a factor

20x1 and 40x1/2 are both factors unless your teacher doesn't include fractions, so just choose this for now and if you get it wrong ask your teacher because three and six arent

is means division by fractions

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.