Answer:
f(x) = x² - 81 = ( x+ 9)(x - 9) Difference of two squares
g(x) = x+9/x-9
g(x) . f(x) = x + 9/ x - 9 × (x+9)(x - 9)
= ( x + 9)(x +9)
= ( x + 9)²
= x² + 18x + 81
Hope this helps.
2x+4y=16
2x+4(4)=16
2x+16=16
-16=-16=2x=0
The answers you could use are both the second and the forth. But mostly the fourth.
This would be the equation:
Y= 5/2x+5
I hope I've helped!
