Предмет: Алгебра, автор: marina02201444

розв'яжіть рівняння 2x(x-4)=8-2x

Ответы

Автор ответа: susasa332

1

Ответ:

Объяснение: 2x(x-4)=8-2x

2x*x-2x*4=8-2x

2(x^2)-8x-8+2x=0

2(x^2)-6x-8=0

D=((-6)^2)-4*2*(-6)=36+48=84=(2√21)^2

x1=(6+2√21)/2

x1=(6-2√21)/2

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