Very simple system of equations: x²-y²=63, x+y=21

[@burlfromlondon]

I started with the difference of two squares in the first equation and then substituted the second. Think it is slightly shorter that way?

[@freddyalvaradamaranon304]

Profesor Tambuwal muchas gracias por compartir el interesante ejercicio 😊. Un sistema de ecuaciones con 2 incógnitas. Saludos y bendiciones de parte de mi hija y mi persona 😊❤😊😊

[@tambuwalmathsclass]

I so much appreciate it 🙏

[@Ictguy_]

After exams, I’m still here learning calculations. Can’t believe I really fell in love with these 😢

[@tambuwalmathsclass]

👍👍👍

[@harini7083]

Thank you sir 🙏
x^2-y^2=63
(x+y)*(x-y)=63
Given x+y=21
21*(x-y)=63
x-y=3
Solve
x=12
y=9

[@tambuwalmathsclass]

👍👍

[@attehisrael6674]

I love your method

[@dimitrijbender7285]

Y = 12 x = 9