Question

EXERCIȚIUL 2!!URGENTTT!DAU COROANA ȘI PUNCTE PRIMULUI RASPUNS COMPLET

Answer 1

2. a) (x-1)(2*1+5*1)=(x-1)*7
b) (x+5)[(a-2)+(a+1)] = (x+5)(a-2+a+1) = (x+5)(2a-1)
c) (2x-7)[(3y+4)+(2y-2)] = (2x-7)(3y+4+2y-2) = (2x-7)(5y+2)
d) (x+3y)[(2a-b)-(a+3b)] = (x+3y)(2a-b-a-3b) = (x+3y)(a+2b)

Answer 2

2 a ) 2 ( x - 1 ) + 5 ( x - 1 ) = ( x - 1 ) ( 2 + 5 ) = 7 ( x - 1 )

b ) ( x + 5 ) ( a - 2 ) + ( x + 5 ) ( a + 1 ) = ( x + 5 ) ( a - 2 + a + 1 ) = ( x + 5 ) ( 2 a - 1 )

c) ( 2 x - 7 ) ( 3 y + 4 ) + ( 2 x - 7 ) ( 2 y - 2 ) = ( 2 x - 7 ) ( 3 y + 4 + 2 y - 2 ) =

= ( 2 x - 7 ) ( 5 y + 2 )

d) ( x + 3 y ) ( 2 a - b ) - ( x + 3 y ) ( a + 3 b ) = ( x + 3 y ) ( 2 a - b - a - 3 b ) =

= ( x + 3 y ) ( a - 4 b )