Since the 16th century, similar formulas (using cube roots in addition to square roots), but much more complicated are known for equations of degree three and four (see cubic equation and quartic equation).
Harwa dǎɣ 16e temede nawatay, ən tabaraten olahnen (dakalnen azaran ən əubiquetan dǎɣ ogaran dǎɣ azaran ogdahan), mašan ajotnen ogarnen aśuhu aqalnen atiwazayan fal alɣisab ən degré ən karad əd ikoz (anhiy alɣisab ən əubique əd alɣisab ən quartique).