Question

решите уравнение (х^2-2x-3)*√x-2=0 и укажите сумму его решений

Answer 1

$( {x}^{2} - 2x - 3) times sqrt{x - 2} = 0 \ {x}^{2} - 2x - 3 = 0 \ sqrt{ x- 2} = 0 \ x = 3 \ x = - 1 \ x = 2 \ ( {3}^{2} - 2 times 33) times sqrt{3 - 2} = 0 \ (( - 1)^{2} - 2 times ( - 1) - 3) times - sqrt{ - 1 -2 } = 0 \ ( {2}^{2} - 2 times 2 - 3) times sqrt{2 - 2} = 0 \ 0 = 0 \ 0 sqrt{ - 3} = 0 \ 0 = 0$