Предмет: Алгебра, автор: Anaj13

x + sqrt{40 + x^{2} } = 5

Ответы

Автор ответа: pomoshnik09
0
  х+√40+х²=5
  √40+х²=5-х .обе  части возведем в квадрат
   40+х²=(5-х)²
   40+х²=25-10х+х²
   40-25=-10х
      15=-10х
   х=-1,5
   проверка  -1,5+√40+1,5²=5   -1,5+√40,25=5   -1,5+6,5=5  
ответ -1,5
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