Which would be the best method to use to solve the following equations? Explain your reasoning. Use each method only once.

Factoring
Square root Property
Completing the square
Quadratic Formula

A. 3x^2-192=0
Method:
Why:

B. x^2-x-6=0
Method:
Why:

C. x^-6x-7=0
Method:
Why:

D. x^2-17x-7=0
Method:
Why:​

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

In the triangles, tr = ge and sr = fe. if = 3.2 ft, which is a possible measure of ? 1.6 ft 3.0 ft 3.2 ft 4.0 ft