Question

1. multiply $7n(6n + 3)$.○ $42n^2 + 21n$○ $42n + 21$○ $13n + 10n$○ $n + 4$

Explanation:

Step1: Apply distributive property

$7n(6n + 3) = 7n \times 6n + 7n \times 3$

Step2: Calculate each product

$7n \times 6n = 42n^2$, $7n \times 3 = 21n$

Step3: Combine the terms

$42n^2 + 21n$

Answer:

$\boldsymbol{42n^2 + 21n}$ (Option: $42n^2 + 21n$)