Question

(2x-1)(x2-5)=x(x2-5) і 2x -1 = x

Answer 1

Ответ:

1)(2x-1)(x2-5)=x(x2-5)

2x-(x×2-5)=x×(2-5)

2x-(2x-5)=x×(2-5)

2x-(2x-5)=x×(-3)

2x-(2x-5)=-x×3

2x-2x+5=-x×3

2x-2x+5=-3x

5=-3x

-3x=5

x=

$- \frac {5}{3}$

2)2x-1=x

2x=x+1

2x-x=1

x=1