Solve x2 = 12x – 15 by completing the square. which is the solution set of the equation?

(hurry! ) which expression is equivalent to the following complex fraction?

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).

17 in long 1.3 ft wide and 8in high what is the volume