<P> Robert Recorde ( c. 1512 -- 1558 ) was a Welsh physician and mathematician . He invented the `` equals '' sign ( = ) and also introduced the pre-existing `` plus '' sign ( + ) to English speakers in 1557 . </P>
<P> Robert Recorde ( c. 1512 -- 1558 ) was a Welsh physician and mathematician . He invented the `` equals '' sign ( = ) and also introduced the pre-existing `` plus '' sign ( + ) to English speakers in 1557 . </P>
who was the first english mathematician who first used the modern symbol of quality in 1557
who was the first english mathematician who first used the modern symbol of quality in 1557
Robert Recorde
Robert Recorde