Question

решите 1, пожалуйста

Answer 1

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)