Find the x-values (if any) at which the function f(x) = x+2 x2+6x+8 is not continuous. Which of the discontinuities are removable? no points of discontinuity x = −2 (not removable), x = −4 (removable) x = −2 (removable), x = −4 (not removable) no points of continuity x = −2 (not removable), x = −4 (not removable)