However, even for solving quadratic equations, the factoring method was not used before Harriot's work published in 1631, ten years after his death.In , the author notes "In view of the present emphasis given to the solution of quadratic equations by factoring, it is interesting to note that this method was not used until Harriot's work of 1631". In his book Artis Analyticae Praxis ad Aequationes Algebraicas Resolvendas, Harriot drew tables for addition, subtraction, multiplication and division of monomials, binomials, and trinomials. Then, in a second section, he set up the equation , and showed that this matches the form of multiplication he had previously provided, giving the factorization .
However, even for solving quadratic equations, the factoring method was not used before Harriot's work published in 1631, ten years after his death.In , th.e author notes "In view of the present emphasis given to the solution of quadratic equations by factoring, it is interesting to note that this method was not used until Harriot's work of 1631". In his book Artis Analyticae Pr?axis ad Aequationes Algebraicas Resolvendas, Harriot drew ta!bles for ad?dition, subtraction, multiplication and division of monomials, binomials, and trinomials. Then, in a second section, he set up the equation , and sho:wed that this matches the form of multiplication he had previously provided, giving the factorization .