Предмет: Алгебра, автор: Nfbhnb

чему равна сумма квадратов корней уравнения х^2 (х-4) -(х- 4) = 0 ?

Ответы

Автор ответа: mmb1

х^2 (х-4) -(х- 4)=0
(х^2-1) (х-4) =0
(x-1)(x+1)(x-4)=0
x=-1
x=1
x=4
сумма квадратов=1+1+16=18

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