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okcana12345
@okcana12345
August 2022
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1)Выполните действия: (c – 4)(c + 1) – 2c(3 – c).
2)Решите уравнение: (x2 - 2)x = (x + 4)(x2 – 4x + 16)
3)Найдите значение выражения: (m – 3)2 – (3 – m)(m + 3).
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гюйс
Verified answer
(с-4)(с+1) -2с(3-с)=с²+с-4с-4 -6с+2с²=3с² - 9с - 4
.
(х² -2)х=(х+4)(х²-4х+16)
х³-2х=х³ - 4х²+16х+4х² - 16х+64
- 2х=64
х= - 64:2
х= - 32
.
(m-3)² -(3-m)(m+3)=m² -6m+9 - 9+m²=2m² - 6m=2m(m-3)
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Answers & Comments
Verified answer
(с-4)(с+1) -2с(3-с)=с²+с-4с-4 -6с+2с²=3с² - 9с - 4.
(х² -2)х=(х+4)(х²-4х+16)
х³-2х=х³ - 4х²+16х+4х² - 16х+64
- 2х=64
х= - 64:2
х= - 32
.
(m-3)² -(3-m)(m+3)=m² -6m+9 - 9+m²=2m² - 6m=2m(m-3)