Предмет: Алгебра, автор: Татьянайй

A)16-а^2
Б)x^2-4,41
B)625-a^4

A)16x^2-49=0
Б)(x+3)(x-3)-x(x+5)=0

A)27+a^3
Б)b^3-8

вычислите:63^2-27^2

решите пожалуйста

Ответы

Автор ответа: Lesben

16-aˇ2=4ˇ2-aˇ2=(4+a)(4-a)
625-aˇ4=5ˇ4-aˇ4=(5ˇ2)ˇ2-(aˇ2)ˇ2=(5ˇ2+aˇ2)(5ˇ2-aˇ2)=
=(25+a2)(5+a)(5-a)
(x+3)(x-3)-x(x+5)=xˇ2-9-xˇ2-5x=-5x-9

27+aˇ3=3ˇ3+aˇ3=(3+a)(9-3a+aˇ2)
bˇ3-8=bˇ3-2ˇ3=(b-2)(bˇ2+2b+4

63ˇ2-27ˇ2= (63+27)(63-27)=90.36=3240

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Английский язык, автор: fiksatorytop

The Hero of Our Days. There are many heroic professions, but they are dangerous and difficult. Such professions as: fireman, doctor, savior and policeman. The word "police" has ancient Greek roots. The literal translation is "city, state."The police of Kazakhstan is a relatively young, and this year it will be 27 years old. Every day Kazakh police heroically stand guard over order, protecting citizens of the country. A policeman must be strong and brave. The prime example of the hero of our days is Omirzhan Temirbekov. He has been serving in the internal police since August 2002. On June 9, 2016, a regular day began for him in the service in Nur-Sultan. He was returning from work to dinner, but suddenly he heard children crying for help. Omirzhan saw a boy lying face up in the water. Without hesitation, the police captain rushed into the river, took out the child and called an ambulance. He talks about his act reluctantly, embarrassed, because he does not like to be called a hero. "I do not consider myself a hero. Any person should have done so," says Temirbekov. Choose the correct answer. 1.

When was the police of Kazakhstan established? [1]

1 год назад

Предмет: Биология, автор: anastasiapovolockaa2

заповніть схему, правильно розмістивши в ній наведені поняття: ангіна, висипний тиф, дифтерія, повітряно-крапельний, туберкульоз, холера, через їжу, через укуси комах, чума, шлях зараження збудником.
Срочно помогите пожаллуйста......

1 год назад

Предмет: Математика, автор: karachov26

Порівняйте ( на фото)

1 год назад