Answer:

Step-by-step explanation:

Answer:
9x - 15
Step-by-step explanation:
Using the addition of like terms we know that 4x + 2x = 6x, and 6x + 3x = 9x, and then we just put -15 at the end and we end up with 9x - 15
Answer:
3x^2-1
Step-by-step explanation:
Yes, its also an integer, rational and real number
Answer:
<h2>

</h2>
Step-by-step explanation: