Пошаговое объяснение:
1.
8у^3-50у=2у(4у^2-25)=
=2у(2у-5)(2у+5)
2.
а=3х+1
S=6×(3x+1)^2=6(9x^2+6x+1)=
=54x^2+36x+6
3.
a=3x+1
V=a^3
V=(3x+1)^3=27x^3+3×(3x)^2×1+
+3×3x×1^2+1^3=
=27x^3+27x^2+9x+1
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Answers & Comments
Пошаговое объяснение:
1.
8у^3-50у=2у(4у^2-25)=
=2у(2у-5)(2у+5)
2.
а=3х+1
S=6×(3x+1)^2=6(9x^2+6x+1)=
=54x^2+36x+6
3.
a=3x+1
V=a^3
V=(3x+1)^3=27x^3+3×(3x)^2×1+
+3×3x×1^2+1^3=
=27x^3+27x^2+9x+1