Х^3 - 5х^2 - 4х +20=0
x^2(x-5)-4(x-5)=0
(x-5)(x^2-4)=0
x=5 или x^2-4=0
x^2=4
x1=2 x2=-2
Ответ:-5;2:-2
<span>x^2 + 10x + 22 = 0</span>
D = 10^2 - 4*22 = 100 - 88 = 12
√D = √4*3 = 2√3
x₁ = ( - 10 + 2√3)/2 = - 5 + √3
x₂ = ( - 10 - 2√3)/2 = - 5 - √3
Log3 x-log9 x=log3 x-log3^2 x=log3 x-1/2*log3 x=1/2*log3 x
<span>(3√5)²/15 = (9*5)/15= 45/15= 3
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