1) 2x/x-3 + 11/2=3/x 2) 2x-8/x-5 + 10/(x-5)(x+5) =x+4/x+5 3) 2/2-x + 1/2=4/2x+x^2

Question

1) 2x/x-3 + 11/2=3/x

2) 2x-8/x-5 + 10/(x-5)(x+5) =x+4/x+5

3) 2/2-x + 1/2=4/2x+x^2

Answer 1

2-3+5.5=3/x
4.5=3/x
4.5=3/x. x0
4.5x=3
x=3/4.5
x=3/45/10
x=10/15
x=2/3. x неравен 0

1-x+1/2=2x+x2
2+1/2-x=2x+x2
3/2-x=2x+x2
2*3/2-2x=2*2x+2x2
3-2x=4x+2x2
3-2x-4x-2x2=0
3-6x-2x2=0
-2x2-6x+3=0
2x2+6x-3=0
ищем дискриминант
x1=-3-корень15/2
x2=-3+корень15/2

Comments

спасибо