Вопрос школьника по предмету Математика
решите уравнение 5 в корне 3-х= -2
Ответ учителя по предмету Математика
3/(а+1) + 2а = 5, где в не равно -1
3+2a^2+2a = 5a+5
2а^2-3a-2=0
Д=25
а=2 и а=-0,5 исключаем так как не принадлежит ОДЗ
Корень из (3-х) =2 возводим обе части уравнения в квадрат
3-х=4
-х=4-3
-х=1
х=-1
ответ х=-1
Похожие вопросы от пользователей
Выбрать правильный ответ
James is going to give up French. He’s terrible with
at it.
2 loften get confused about in the pronunciation of
English words.
3 We’ve done this exercise three times, We’re sick of at
doing it.
Do you ever feel depressed with / about the future?
5 Paula wants to study history She’s always been
fascinated in / by the subject.
own isn’t tolerant at of bad behaviour in his
lessons.
7 Chris is really skilful at with resolving problems
between other people
Danny has traveled al over the world so he’s
knowledgeable in / about geography
lam often disturbed by with my younger sister when
Tm doing my homework
Ann is petrified of at taking exams. She gets
extremely nervous.