Should I use factoring, square root property, completing the square, or the quadratic formula to solve these?

Question

helpmemathplsaha · Answer

attachment

helpmemathplsaha · Answer

I can only use each once. I don't have to solve, just tell why I would use the particular method.

helpmemathplsaha · Answer

I picked factoring for C and said because each of the numbers are common factors of 4.

jhonyy9 · Answer

A.  4x^2 -27 = 0  add to both sides 27 and will get 

    4x^2 = 27  divide both sides by 4 and will get 

    x^2 = 27/4 mqke square root from both sides and get 

x_1,2 = +/- sqrt(27/4) = +/- sqrt((9*3)/4) = +/- (3/2)sqrt3

hope helped

helpmemathplsaha · Answer

Do you know what B and D would be? @jhonyy9