Question

rozwiąż równanie

a) 2x(x - 1) = 1 + 2x kwadrat

b) 2x(x- 1) - xkwadrat = (1+x)x

Answer 1

^2 - druga potęga(kwadrat)

a) 2x(x - 1) = 1 + 2x^2

    2x^2 - 2x = 1 + 2x^2

   -2x = 1 + 2x^2 - 2x^2

    -2x= 1 /: (-2)

    x= - 1/2

 

b) 2x(x - 1) - x^2 = (1+x)x

    2x^2 - 2x - x^2 = x + x^2

    x^2 - 2x = x + x^2

    x^2 - x^2 = x + 2x

     0 = 3x