" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
D=R-{4}
2x-9=x(x-4)
x²-4x-2x+9=0
x²-6x+9=0
(x-3)²=0
x=3
D=R-{3}
2x-9=(x-3)(x+3)
x²-2x+9-9=0
x²-2x=0
x(x-2)=0
x=0 lub x=2