Answered

Expand. Your answer should be a polynomial in standard form.

[tex]\[
\left(k^2 - 5k - 2\right)\left(k^2 + 2\right) =
\][/tex]

[tex]\(\square\)[/tex]

---

Related content: Multiplying binomials by polynomials

2:34

Report a problem



Answer :

To expand the expression [tex]\((k^2 - 5k - 2)(k^2 + 2)\)[/tex], we can use the distributive property (also known as the FOIL method for binomials). Here’s the step-by-step expansion:

First, we will distribute [tex]\(k^2\)[/tex] from the first polynomial to each term in the second polynomial:
[tex]\[ k^2 \cdot (k^2 + 2) = k^4 + 2k^2 \][/tex]

Next, we will distribute [tex]\(-5k\)[/tex] from the first polynomial to each term in the second polynomial:
[tex]\[ -5k \cdot (k^2 + 2) = -5k^3 - 10k \][/tex]

Lastly, we will distribute [tex]\(-2\)[/tex] from the first polynomial to each term in the second polynomial:
[tex]\[ -2 \cdot (k^2 + 2) = -2k^2 - 4 \][/tex]

Now, we combine all these results together:
[tex]\[ k^4 + 2k^2 - 5k^3 - 10k - 2k^2 - 4 \][/tex]

Next, we combine like terms:
[tex]\[ \begin{align*} &= k^4 - 5k^3 + (2k^2 - 2k^2) - 10k - 4 \\ &= k^4 - 5k^3 - 10k - 4. \end{align*} \][/tex]

So, the expanded form of [tex]\((k^2 - 5k - 2)(k^2 + 2)\)[/tex] is:
[tex]\[ \boxed{k^4 - 5k^3 - 10k - 4}. \][/tex]