Answer:
1
Step-by-step explanation:
The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42
The factors of 65 are: 1, 5, 13, 65
Then the greatest common factor is 1.
15
Answer:the first ans (f(x)=(1/x+2)+3
2(2x + 5)(2x - 5)
= (4x + 10)(2x - 5)
= 8x² - 20x + 20x - 50
= 8x² - 50
the answer is 3 and 9. 9 is 6 greater than 3 and 9 squared and 3 squared added up give you 90.