Question

rozwiąż poniższe równania:
a) x(x+5)²(x-1)=0
b) x³+2x²-9x-18=0

Answer 1

[tex]a)\\x(x+5)^{2}(x-1)=0\\x = 0\ v\ x = -5\ v\ x = 1\\\\b)\\x^{3}+2x^{2}-9x-18 = 0 \\x^{2}(x+2) -9(x+2) = 0\\(x^{2}-9)(x+2) = 0\\(x-3)(x+3)(x+2) = 0\\x = -3\ v\ x=-2\ v\ x=3[/tex]