<span>b6=0.81*(-1/3)^5=0.81*-1/81*3=-0.01/3=-1/300</span>
(2х +1)(х-3) = 2(х^2 + х + 9)
2х^2 - 6х + х - 3 = 2х^2 + 2х + 18
-6х + х - 3 = 2х +18
- 5х - 3 = 2х + 18
-5х - 2х = 18 + 3
-7х = 21 | ÷ ( - 7)
х = - 3
Ответ: -3
Log0,5 (x^2-3x)=-2
ОДЗ: x^2-3x>0 или
x<0 и x>3
x^2-3x = 0,5^(-2)
x^2-3x -4 = 0
x1 = 4
x = -1
log2 Vх -log2 1/x =3
ОДЗ: x>0
log2 {Vx\(1\x)} = 3
xVx = 2^3
(x^(3\2))^2 = 2^6
x^3 = 2^6
<span>x = 2^2 = 4</span>
X^2-10x+16=(x-8)(x-2)
X1+X2=10
X1*X2=16 X1=8; X2=2