Question

1. $9x^{4}y^{3} cdot 2y^{6}$

Explanation:

Step1: Multiply coefficients

$9 \times 2 = 18$

Step2: Combine like variables (x term)

$x^4$ (no other x terms to combine)

Step3: Combine like variables (y terms)

$y^{3+6} = y^9$

Step4: Multiply all components

$18 \times x^4 \times y^9$

Answer:

$18x^4y^9$