(x+y-3)(x+y+3) = x^2+xy+3x+xy+y^2+3y-3x-3y-9 = -9+x^2+y^2+2xy
Answer:77%
Step-by-step explanation:
Answer: x=6
Step-by-step explanation:

subtract 15 on both sides

divide 5 on both sides


Answer:
(8n^4-6n+8n^2)+(6n^4-4)
8n^4 + 8n^2 - 6n + 6n^4 - 4
<u>14n^4 + 8n^2 - 6n - 4</u>
Step-by-step explanation:
Answer:
Not sure explain it again
Step-by-step explanation:
B