Объяснение:
1) 3a²-12ab = 3a( a - 4b ) ;
2) 25x²-y² = ( 5x - y )( 5x + y ) ;
6 - 9x + 5x = 2x - 6 ;
- 9x + 5x - 2x = - 6 - 6 ;
- 6x = - 12 ;
x = - 12 : ( - 6 ) ;
x = 2 ;
3^11•9^3 + 5,2^0 = 3¹¹ * 3⁶ + 1 = 3¹¹⁺ ⁶ + 1 = 3¹⁷ + 1 .
Объяснение:
1) 3a²-12ab = 3a( a - 4b ) ;
2) 25x²-y² = ( 5x - y )( 5x + y ) ;
(2x-7) (x+1) = 2x² + 2x - 7x - 7 = 2x² - 5x - 7 ; (a-5)² + 10a = a²- 10a + 25 + 10a = a² + 25 ;3(2-3x)+5x=2x-6 ;6 - 9x + 5x = 2x - 6 ;
- 9x + 5x - 2x = - 6 - 6 ;
- 6x = - 12 ;
x = - 12 : ( - 6 ) ;
x = 2 ;
3^11•9^3 + 5,2^0 = 3¹¹ * 3⁶ + 1 = 3¹¹⁺ ⁶ + 1 = 3¹⁷ + 1 .