Plz

what is the expression in simple radical form?

18.52

Step-by-step explanation: not exactly sure if this is right. Had to look it up sorry. (Link=https://www.mathwarehouse.com/arithmetic/square-root-calculator.php)

343−−−√49⋅7−−−−√ 49−−√7–√ 77–√

343−−−√≈18.520259177452136

g(x) is the negative form of f(x)? because whenever its the negative form it reflects its self over the x axis. idk if this is right though.

step-by-step explanation:

-2

7 - 9 = -2

reversed:

-2 + 9 = 7