You can try an one click root app called Kingroot.
KingRoot is a root tool for “lazy people” who just want to get root access but don’t want to flash any third party Recovery into their lovely device. It can work on almost all device from Android 2.x – 5.0. Working of KingRoot based on system exploit. The most suitable Root strategy will be deployed from cloud to your device according to your ROM information. So, it’s necessary to keep net connection during root process.
May it help you.
