Лпалоаоаоаоолвлагушоаоаопт
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Оплоалплалвзуззцщушпоаочтвтаи
478;:7789002/7784929
<span>(а-6)(а²+2)-(4а+1)(а-3)=
=a</span>³+2a-6a²-12-(4a²-12a+a-3)=
=a³+2a-6a²-12-(4a²-11a-3)=
=a³+2a-6a²-12-4a²+11a+3=
=a³+13a-10a²-9.
при а=3====>>>3<span>³+13*3-10*3²-9=
=27+39-10*9-9=
=27+39-90-9
=-33</span>
1) 4х² - 9 =(2х-3)(2х+3)
2) a⁶ - 8 =(а²-2)(а⁴+2а²+4)
<span>3) x</span>³<span> - 8x</span>²<span> + 16x =х(х</span>²-8х+16)=х(х-4)²
Π(x+3)=π/4+2πn U π(x+3)=3π/4+2πn.n∈z
x+3=1/4+2n U x+3=3/4+2n,n∈z
x=-2 3/4+2n U x=-2 1/4+2n,n∈z
n=2
x=-2 3/4+4=1 1/4 U x=-2 1/4+4=1 3/4
x=1 1/4 наим полож
log₂0,25=log₂1/4=log₂2⁻²=-2