Question

If you subtract a number x from 21 times that number, and then take the cube of the difference, what will be the result?
With full explanation

Answer 1

if x is written then it's exponent is 1
x^21-x^1
21-1=20
x^20 answer

Answer 2

Subtract a number x from 21 times that number:

⇒ 21x - x

⇒ 20x

Take the cube of the difference:

⇒ (20x - x)³

⇒ (19x)³

⇒ 6859x³

Answer: The answer is 6859x³