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Pharmit24
@Pharmit24
July 2022
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zhenyaM2002
Verified answer
27х³ - у³ = (3х)³ - у³ = (3х -у)(9х² + 3ху +у²)
25а³ -ab² = a(25a² - b² ) = a( (5a)² - b² ) =a(5a-b)(5a+b)
-3x² - 12x -12 = - 3(x² + 4x + 4) = -3(x² +2*x*2 +2² ) =
= -3(x+2)² = - 3(x+2)(x+2)
3ab - 15a +12b - 60 = 3a(b - 5) + 12(b -5) =(3a+12)(b-5)
a⁴ - 625 = a⁴ - 5⁴ = (a²)² - (5²)² = (a² -5²)(a² + 5²) = (a-5)(a+5)(a² + 25)
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Answers & Comments
Verified answer
27х³ - у³ = (3х)³ - у³ = (3х -у)(9х² + 3ху +у²)25а³ -ab² = a(25a² - b² ) = a( (5a)² - b² ) =a(5a-b)(5a+b)
-3x² - 12x -12 = - 3(x² + 4x + 4) = -3(x² +2*x*2 +2² ) =
= -3(x+2)² = - 3(x+2)(x+2)
3ab - 15a +12b - 60 = 3a(b - 5) + 12(b -5) =(3a+12)(b-5)
a⁴ - 625 = a⁴ - 5⁴ = (a²)² - (5²)² = (a² -5²)(a² + 5²) = (a-5)(a+5)(a² + 25)