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kisavasilisa20
@kisavasilisa20
September 2021
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Запишите в виде куба двучлена:
a^3|8(дробь)+9|4(дробь)a^2b+27|2(дробь)ab^2+27b^3
0,008m^3-0,36m^2n+5,4mn^2-27n^3
Разложите на множители:
27x^3-125y^3
0,027a^3+64b^3
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vicper1957z
Verified answer
(а³/8 )+9а²в/4+27ав²/2 +27в³= (а/2)³+3(а/2)²(3в) +3(а/2)(3в)² +(3в)³ =
( а/2 + 3в)³;
= (0,2m)³ - 3 ( 0,2m)²(3n) +3(0,2m)(3n)² -(3n)³ =( 0,2m- 3n)³;
= (3x)³- (5y)³ = ( 3x - 5y)( (3x)²+ (3x)(5y) +(5y)²);
= (0,3a)³+(4b)³= ( 0,3a+4b)(( 0,3a)²- (0,3a)(4b) +(4b)²)
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Answers & Comments
Verified answer
(а³/8 )+9а²в/4+27ав²/2 +27в³= (а/2)³+3(а/2)²(3в) +3(а/2)(3в)² +(3в)³ =( а/2 + 3в)³;
= (0,2m)³ - 3 ( 0,2m)²(3n) +3(0,2m)(3n)² -(3n)³ =( 0,2m- 3n)³;
= (3x)³- (5y)³ = ( 3x - 5y)( (3x)²+ (3x)(5y) +(5y)²);
= (0,3a)³+(4b)³= ( 0,3a+4b)(( 0,3a)²- (0,3a)(4b) +(4b)²)