Вопрос школьника по предмету Алгебра
ПОМОГИТЕ ПОЖАЛУЙСТА, СРОЧНО НАДО.ДАЮ 62 БАЛЛА!
Решите уравнение:
1.2x^2=18
2.3x^2-300=0
3.2x^2-8x/3=0
Ответ учителя по предмету Алгебра
Ответ:
1) +/-3
2) +/-10
3) 0; -4
Объяснение:
1) 2х^2 =18,
х^2 = 9
х_1,2 = +/-3
2) 3х^ 2 — 300 = 0
3х^2 = 300
х^2 = 100
х = +/-10
3) (2х^2 — 8х)/3 = 0
2х^2 — 8х = 0
2х(х — 4) = 0
2х = 0
х1 = 0
Или
х — 4 = 0
х2 = 4
Похожие вопросы от пользователей
2xy-3xy во 2 степени
lived in Africa and they had a little Baby
Elephant.
One day Father Elephant carne home
and saw that his dear little Baby
Elephant was sad.
And Father Elephant asked, «Why are
you sad, my little Baby Elephant?»
Baby Elephant said, «Oh, Dad, I want
to play in our school football team. But
my socks, T-shirt and shorts are too small and 1 can’t
put them on.» «Don’t worry, my dear!» said Father
Elephant. «I’ll buy you nice new clothes.»
They came to Mrs Lion’s shop.
«Good morning, Mrs Lion,» said Father Elephant.
«Good morning, Mr Elephant!» said Mrs Lion. «Can I
help you?»
«Have you got any nice socks for my little Baby
Elephant? 1 want to buy him some new socks,» said
Father Elephant. «All our socks are too small
for your Baby Elephant. But wait a little,
and my little Lions will make him new beautiful socks.»
The little Lions made nice new yellow socks for Baby
Elephant.
Then Father Elephant paid for the socks and
put them on Baby Elephant.
Baby Elephant was very glad, and he said, «I like my
new socks very much, thank you.» «Let’s buy you a new
T-shirt and shorts now!» said Father Elephant. So they
went to Mrs Tiger’s shop.