Помогите с решением. Created by Eira02. algebra-ru

6. ОДЗ: х≠510. ответ 6 11. x≠0ответ - 3

Помогите с решением...

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6. ОДЗ: х≠5
$\frac{x-4}{x-5} =5$
$x-4 = 5(x-5)$
$x-4=5x-25$
$4x =21$
$x = 5,25$
10. $\frac{4}{3} x^2 = 48$
$x^2 = 48* \frac{3}{4}$
$x^2 = 36$
$x = \sqrt{36}$
$x = б6$
ответ 6
11. $x+ \frac{3}{x} =-4|*x$
x≠0
$x^2+3=-4x$
$x^2+4x+3 = 0$
$D = 16-12 = 2^2$
$x_{1} = \frac{-4+2}{2} =-1$
$x_{2} = \frac{-4-2}{2} = -3$
ответ - 3

2 votes Thanks 1

sedinalana 6
x-5≠0⇒x≠5
x-4=5(x-5)
5x-25=x-4
5x-x=-4+25
4x=21
x=5,25
10
4/3*x²=48
x²=48:4/3=48*3/4
x²=36
x=-6 U x=6
Ответ х=6
11
x≠0
x²+4x+3=0
x1+x2=-4 U x1*x2=3
x1=-3 U x2=-1
Ответ х=-3

0 votes Thanks 0

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