" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2x^2+1-19=0
2x^2-18=0
x^2-9=0
x^2-3^2=0
(x-3)(x+3)=0
x1=3
x2=-3