Please help
need explanation
will give the brainliest​

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.