How do you find the equivalent expression to something? ex: 4d+6+2d

Find parametric equations for the line tangent to the curve of intersection of the surfaces at the given point. surfaces: xsquared2plus+2yplus+2zequals=1212 yequals=33 point: left parenthesis 1 comma 3 comma five halves right parenthesis

If eh = hg and hg=16, find the diameter of k

What’s 8y+48 and factor each expression completely