Предмет: Алгебра, автор: nvv23042005

найти значение выражения 4√x+3 /3 при x=-0.75

Ответы

Автор ответа: subvufer72
4

Умножаем в скобка "фонтанчиком" и получаем:

x²-7x+4x-28+10x-x²+30-3x

Теперь приводим подобные, x² и -x² зачеркиваешь, -7x+4x+10x-3x дает нам 4x , а -28+30 дает нам 2,

получаем

= 4x+2 , подставляем x=0,75

4*0,75+2=5

Ответ: 5 (это решение,если нужно подробно)

если кратко, то

x²-7x+4x-28+10x-x²+30-3x=4x+2=5

Ну вроде правильно=)


nvv23042005: Уверен?
subvufer72: да если что то не нравится мог и вообще не писать....
nvv23042005: Ответ 2...
nvv23042005: Но всё равно спасибо^_^
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