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ggg3303
@ggg3303
July 2022
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dimmaric03
Г)
х+а
+
х-а
=
а(х+а)+х(х-а)
=
ах+а^2-x^2-ax
=
a^2-x^2
x^2 ax ax^2 ax^2 ax^2
д
)
y+b
+
y+b
=
b(y+b)+y(y+b)
=
by+b^2+y^2+by
=
2by+b^2+y^2
y^2 by by^2 by^2 by^2
e)
a-2b
-
b-2a
=
a(a-2b)-b(b-2a)
=
a^2-2ab-b^2+2ab
=
a^2-b^2
ab^2 a^2b a^2b^2 a^2b^2
ж)
c-d
-
c+d
=
d(c-d)-c(c+d
)=
cd-d^2-c^2-cd
=
-d^2-c^2
c^2d cd^2 c^2d^2 c^2d^2 c^2d^2
з)
a^2-b^2
+
2
=
a^2-b^2+2b^2
=
a^2+b^2
b^5 b^3 b^5 b^5
и)
x^3+1
-
1
=
x^3+1-x^3
=
1
x^7 x^4 x^7 x^7
2 votes
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Answers & Comments
x^2 ax ax^2 ax^2 ax^2
д) y+b+y+b=b(y+b)+y(y+b)=by+b^2+y^2+by=2by+b^2+y^2
y^2 by by^2 by^2 by^2
e) a-2b - b-2a=a(a-2b)-b(b-2a)=a^2-2ab-b^2+2ab=a^2-b^2
ab^2 a^2b a^2b^2 a^2b^2
ж) c-d - c+d=d(c-d)-c(c+d)=cd-d^2-c^2-cd=-d^2-c^2
c^2d cd^2 c^2d^2 c^2d^2 c^2d^2
з) a^2-b^2 + 2 =a^2-b^2+2b^2=a^2+b^2
b^5 b^3 b^5 b^5
и) x^3+1 - 1 =x^3+1-x^3= 1
x^7 x^4 x^7 x^7