A safety rearview mirror has flexible mirrors (1) that are flexed selectively with a flex-control switch (2) on a turn-signal lever (4) of a motor vehicle (6). The flex-control switch controls a flex actuator (7) that is in contact with a back side of the flexible mirror. The flexible mirror is flexed to a convexly flexed mode to provide wide-area rearview for eliminating rearview blind spots, for lane-changing, for turning, for backing up and for responding to rearward conditions and dangers. For non-widened rearview, the flexible mirror is flexed to a flat mode. The flex-control switch is adapted to be affixed to the turn-signal lever for actuating the flexed mode by turn-signaling with the turn-signal lever. Return steering after a turn or de-activating the turn signal deactivates the flexed mode. Optionally also, the flex-control switch includes a non-signaling flex-control switch (3) that can be adapted for actuating and de-actuating the flexed mode by hand operation without turn-signal movement of the turn-signal lever. The flexible mirror includes a vehicle-compatible rearview-mirror case (10) that is affixable to either or both sides and inside of a motor vehicle predeterminedly. Communication of flex control from the flex-control switch to the flex actuator wherever the flexible mirror is positioned can be mechanical, electrical, radio-wave, computer-controlled or combinations thereof predeterminedly.