Final answer:
To multiply out the brackets, use the distributive property and multiply the outer number by each term inside the parentheses.
Step-by-step explanation:
To multiply out the brackets in the expression 9(2p + 3(x + 5)), you need to apply the distributive property. This means multiplying the outer number, which is 9, by each term inside the parentheses.
Starting with the first term, you multiply 9 by 2p to get 18p.
Next, you multiply 9 by 3(x + 5). Using the distributive property again, you multiply 9 by each term inside the parentheses. This gives you 27x + 45.
So, the result of multiplying out the brackets is 18p + 27x + 45.