“When I was in third grade, I was in quadratic equations when my class was, like, reading clocks,” Andraka says.
As a teen, Randy had painted a submarine, an elevator door and the quadratic equation on the walls of his childhood bedroom.
1650s, "square," with -ic + obsolete quadrate "a square; a group of four things" (late 14c.), from Latin quadratum, noun use of neuter adjective quadratus "square, squared," past participle of quadrare "to square, set in order, complete" (see quadrant). Quadratic equations (1660s) so called because they involve the square of x.