Question

Kona’s mother realized that her age is the difference of Kona’s age squared and four. If k represents Kona’s age, which expression represents Kona’s mother’s age?

Answer 1

The answer is A

Explanation:

Answer 2

Answer: The required expression representing Kona's mother age is
`k^2-4.`

Step-by-step explanation: Given that Kona’s mother realized that her age is the difference of Kona’s age squared and four.

We are to find the expression that represents Kona’s mother’s age.

Given that Kona's age is represented by
`k`.

So, the square of Kona's age will be
`k^2.`

Now, we are suppose to take the difference of
`k^2` and 4, which is represented by

`k^2-4.`

We cannot take
`4-k^2,` because the age of Kona's mother cannot be so small.

Therefore, if 'm' represents the age of Kona's mother, then we get

`m=k^2-4.`

Thus, the required expression is
`k^2-4.`