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v6819931
@v6819931
June 2023
1
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Алгебра 7 класс
задания на фото
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ogo54
2)
(х-5)^2+(х-3)•(х+3)
х^2-10x+25+х^2-9
2x^2-10×+16
(3m-2)•(3m+2)+(2m-3)^2
9m^2-4+4m^2-12m+9
13m^2+5-12m
13m^2-12m+5
3)
(x-6)(x+6)-x*2=3-3x
x^2-36-x^2=3-3x
-36=3-3x
3x=3+36
3x=39
X=13
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v6819931
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Answers & Comments
(х-5)^2+(х-3)•(х+3)
х^2-10x+25+х^2-9
2x^2-10×+16
(3m-2)•(3m+2)+(2m-3)^2
9m^2-4+4m^2-12m+9
13m^2+5-12m
13m^2-12m+5
3)
(x-6)(x+6)-x*2=3-3x
x^2-36-x^2=3-3x
-36=3-3x
3x=3+36
3x=39
X=13