Question

Hey can you please help me posted picture of question

Answer 1

The answer is
B
The answer must have a positive twenty so you can rule out A and C.
That leaves us with D
D has just 6x. The x has to be 3x times 4 and 6x times 5, which comes out to 42x, proving D wrong and leaving you with B

Answer 2

Answer:
18x³ + 30x² + 42x + 20

Step-by-step explanation:
Before we begin, remember the following:
xᵃ * xᵇ = xᵃ⁺ᵇ

Now, for the given:
To solve this question, we will simply multiply each term from the first bracket by each term from the second bracket and then combine like terms to get the final expression.

This can be done as follows:
(3x² + 3x + 5)(6x + 4)
3x²(6x) + 3x²(4) + 3x(6x) + 3x(4) + 5(6x) + 5(4)
18x³ + 12x² + 18x² + 12x + 30x + 20
18x³ + (12+18)x² + (12+30)x + 20
18x³ + 30x² + 42x + 20

Hope this helps :)