" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
9-x^2 ≥ 8x^2
9 ≥ 8x^2 + x^2
9 ≥ 9x^2
1 ≥ x^2
x ≤ +- 1
artinya
x1 ≤ 1
x2 ≤ -1