X²-5x=0
x(x-5)=0
x=0, x=5
x²+7x+12=0
D=7²-4*12=49-48=1
x=(-7+1)/2=-6/2=-3
x=(-7-1)/2=-8/2=-4
(x²+9)/x=2x
x≠0
x²+9=2x²
2x²-x²-9=0
x²-9=0
(x-3)(x+3)=0
x=-3, x=3
N > -4
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n=-3 - наименьшее целое решение неравенства
Ответ: -3
А) 3∛64 +3∛-125 = 3·4 -3·5 = -3
б) 3√27х -3√216х = 9√3х -18√6х
в)-3·3√2 /3 √54 = -9√2 / 9√6 = -1/√3 = -√3/3