Question

Rozwiaz rownanie

a)x(x+5)(x-2)=0

b)-x do 3+5x do 2-x+5=0

Answer 1

a)x(x+5)(x-2)=0

x=0

 

x+5=0

x=-5

 

x-2=0

x=2

 

x=0  ∨  x=-5  ∨ x=2

 

b)-x³+5x²-x+5=0

-x²(x-5)-1(x-5)=0

(x-5)(-x²-1)=0

x-5=0

x=5