Using only the Second Derivative Test, find the coordinates of the relative extrema for the given function. [3.4] 16) f(x)=2x+- 10 x 8(x)=x²-x²-3x² 17) 18) h(x)= (3x-1)² Answers 16) f has a relative maximum at (-√5,-4√5) and a relative minimum at (√5,4√5) 17) g has a relative maximum at (0,0) and relative minima at (₁0) 18) h has a relative minimum at but no relative maximum and 3, 45