Question

question
fully simplify.
$-9x^4y(-2y)$

Explanation:

Step1: Multiply the coefficients

Multiply -9 and -2.
\( (-9) \times (-2) = 18 \)

Step2: Multiply the variables with the same base (y)

Use the rule \( a^m \times a^n = a^{m + n} \) for \( y \times y \).
\( y \times y = y^{1 + 1} = y^2 \)

Step3: Combine the results

The \( x^4 \) term remains as it is (since there's no other x term to multiply with). Combine the coefficient, \( x^4 \), and \( y^2 \).
\( 18x^4y^2 \)

Answer:

\( 18x^4y^2 \)