Question

multiply.
$-u^{4}(-5u^{4})$
simplify your answer as much as possible.

Explanation:

Step1: Multiply the constants

$(-1) \times (-5) = 5$

Step2: Multiply the variable terms

$u^4 \times u^4 = u^{4+4} = u^8$

Step3: Combine the results

$5 \times u^8 = 5u^8$

Answer:

$5u^8$