Without simplifying, determine which of the following will represent a rational number. Select all that apply.

A.

423+3√9

B.

423-4√8

C.

423*3√9

D.

423:4√8

A is rational (A=432)

B is irrational (B=411.6862 ...) (non repeating)

C is rational (C=3807)

D is irrational (D=299.1061 ...)

these are the answers but im not sure how to tell without simplifying for this

√8 will never be rational

√9 is a whole number therefore it will come out rational in these equations