Вопрос школьника по предмету Алгебра
Сократите дробь 2х^2-8/х^2+6х+8
Ответ учителя по предмету Алгебра
x^2 + 6x + 8 = 0
D = 6^2 — 4*8 = 36 — 32 = 4 = 2^2
x = (-6 +/- 2) / 2 = -3 +/-1
x1 = -3-1 = -4
x2 = -3 + 1 = -2
Значит, нам нужно уравнение, корни кторого -8 и -4
(x + 8)(x + 4) = 0
x^2 + 12x + 32 = 0
Ответ: x^2 + 12x + 32 = 0
Похожие вопросы от пользователей
S’assied , Pierre, sur, bas, le divan .
Par , terre , je , m’assieds .
S’assied , ma petite soeur , basse, sur , une chaise.
Au stade, et Nicolas , vont, Luc.
Des bonbons , donne , aux enfants , maman.
1)now mom is (going/come) to the supermarket to buy some food
2)my frends (went/came) to may house yestedey and we had some tea
3)dan is (going/coming) to the airiport by car
4)my grenny often (goes/comes) to church on sundays
5)where are you (going/coming) ?-to the souvenir shop
6)we (went/came) up to the castle late at night
7)sarah wants (to go/to come) to sidney
8)»lets (come/go) in,» mom said when we (went/came) to the house
9)dad (went/came) home late last night