Объяснение:
1 . 5) ( x + 1 )/(x²- xy ) i ( y - 1 )/(xy - y²) ;
y*(x + 1 )/xy(x - y ) i x*(y - 1)/xy(x - y ) ;
6) 6a/(a - 2b) i 3a/( a + b ) ;
6a( a + b )/(a + b)(a - 2b ) i 3a(a - 2b)/(a + b)(a - 2b ) ;
7) ( 1 + c²)/( c² - 16 ) i c/( 4 - c ) ;
( 1 + c²)/( c² - 16 ) i - c(c + 4 )/( c² - 16 ) ;
8) ( 2m + 9 )/(m² + 5m + 25 ) i m/(m - 5 ) ;
(2m + 9 )(m - 5)/(m - 5)(m²+5m +25 ) i m( m²+5m +25 )/(m - 5)(m²+5m +25 ).
Объяснение:
8х+4х2кв-4-2х=4х2кв-12х+5
8х-4-2х=х+5
6х-4=-12х+56х-4+12х=5
6х+12х=5+418х=5+4=18х=9х=1,2