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ermachenkov2018
@ermachenkov2018
August 2022
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ВинтЛили
1.
a)3ax-x²=x(3a-x)
b)ab²+5a²b=ab(5a+b)
c)2c⁴-4c³+2c=2c(c³-2c²+1)=2c(c-1)(c²-c-1)
d)b(b-3)-4(b-3)=(b-3)(b-4)
e)2ac+2c+ab+b=(a+1)(b+2c)
2.
a)12a²b²+6a²b³+12ab³=6ab²(ab+2a+2b)
b)b(b-2)²+b²(2-b)=4b-4b²+b³+2b²-b³=4b-2b²=2b(2-b)
c)ax-5x-a²+5a=(a-5)(x-a)
d)ab-ac+2c-2b-b+c=ab-ac-3b+3c=(a-3)(b-c)
3.
bc+b²-3c-3b=(b-3)(b+c)=-0.7
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ermachenkov2018
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ВинтЛили
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Answers & Comments
a)3ax-x²=x(3a-x)
b)ab²+5a²b=ab(5a+b)
c)2c⁴-4c³+2c=2c(c³-2c²+1)=2c(c-1)(c²-c-1)
d)b(b-3)-4(b-3)=(b-3)(b-4)
e)2ac+2c+ab+b=(a+1)(b+2c)
2.
a)12a²b²+6a²b³+12ab³=6ab²(ab+2a+2b)
b)b(b-2)²+b²(2-b)=4b-4b²+b³+2b²-b³=4b-2b²=2b(2-b)
c)ax-5x-a²+5a=(a-5)(x-a)
d)ab-ac+2c-2b-b+c=ab-ac-3b+3c=(a-3)(b-c)
3.
bc+b²-3c-3b=(b-3)(b+c)=-0.7