Question

Rozwiąż równanie x do 3 + 5x do 2 - 9x-45 = 0

Answer 1

X³+5x²-9x-45=0
x²(x+5)-9(x+5)=0
(x²-9)(x+5)=0
(x-3)(x+3)(x+5)=0
x-3=0, x=3
x+3=0, x=-3
x+5=0, x=-5

Answer 2

X³+5x²-9x-45=0
x²(x+5)-9(x+5)=0
(x+5)(x²-9)=0
(x-3)(x+3)(x+5)=0
x-3=0v x+3=0v x+5=0
x=3v x=-3vx=-5

Answer 3

=x kwadrat [x+5] - 9[ x+5 } =[x kwadrat -9] { x+ 5] =[x+3][x-3}[x+5] czyli x= 3 lub -3 lub -5 pozdrawiam