Question

K^4 - 7k^2 ( if k = 3 ) Evaluate each expression given the variable replacement

Answer 1

Given the expression:

`k^4-7k^2`

Let's evaluate the expresion if k = 3.

To evaluate this expression, substitute 3 for k and solve.

We have:

`\begin{gathered} k^4-7k^2 \\ \\ 3^4-7(3)^2 \\ \\ 81-7(9) \\ \\ 81-63 \\ \\ =18 \end{gathered}`

Therefore, the value of the expression if k = 3 is 18 .

ANSWER:

18