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alextalatinnik
@alextalatinnik
July 2022
2
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Решить уравнение
[tex](3-x)^{2} -(x+4)^{2}=7[/tex]
Напишите каждый шаг, пожалуйста
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wejde
Verified answer
(3-x)²-(x+4)²=7
9-6x+x²-(x²+8x+16)=7
x²-6x+9-x²-8x-16=7
-6x-8x=7+16-9
-14x=14
x=-1
1 votes
Thanks 1
HIPM
(3-x)²-(x+4)²=7
9-6x+x²-x²-8x-16-7=0
-14x=14
x=-1
0 votes
Thanks 1
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Answers & Comments
Verified answer
(3-x)²-(x+4)²=79-6x+x²-(x²+8x+16)=7
x²-6x+9-x²-8x-16=7
-6x-8x=7+16-9
-14x=14
x=-1
9-6x+x²-x²-8x-16-7=0
-14x=14
x=-1