" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
x² + nx ]¹₋₂ = 15
(1² -(-2)²) - n(-2-(-1)) = 15
(1-4) - n(-1) = 15
-3 + n = 15
n = 15+3
n = 18