Question

Which polynomial represents a difference of cubes?

x^3 -64
4x^3 -1
8x^3 +27
4x^3 -125

Answer 1

@welshfella

Answer 2

a cube is the result when a number or variable is multiplied by itself 3 times

for example the cube of x = x*x*x = x^3

the cube of 2 is 8 because

2 * 2* 2 = 8

and 2 is called the cube root of 8

Answer 3

a difference, of course, is when one number or variable is subtracted from another

Answer 4

So which one do you think is difference of 2 cubes?

Answer 5

a few more cubes are

3^3 = 27
4^3 = 64
5^3 = 125

Answer 6

x^3-64?

Answer 7

right

Answer 8

is 4x^3 a perfect cube?

Answer 9

yea

Answer 10

Ah caught you there!
x^3 is one but 4 is not
4 is a perfect square
But
8x^3 is a cube

2x*2x*2x = 8x^3

Answer 11

lol oh ok.
Thank u.

Answer 12

yw