18x^2-8=0 I have to factor it but I’m not sure how to! Please help!

Which of the following pairs of functions are inverses of each other? o a. f(x)=x72+8 and 96-9 = 7/x+2) =8 o b. f(x)= 6(x - 2)+3 and g(x) - *#2-3 o c. $4) = 5(2)-3 and 90- 4*: 73 o d. f(x) = 6)-12 and 910 – +12

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120

Solve for x: 5/3 x = 20/21 it's fraction. remember to simplify your fraction