Question

Descompuneti in factori : a) (x + 1)( x + 3 )² - 4( x + 1)  b) ( x + 5 )( 2x -1)² -16( x + 5)

Answer 1

a) Dai factor comun pe (x + 1) => (x + 1) [(x + 3)² - 4] <=> (x + 1 ) { [ ( x + 3 ) + 2 ] * [ ( x + 3 ) - 2 ] } <=> ( x + 1 )( x + 5 )( x + 1 )

b) Dai factor comun pe ( x + 5 ) => ( x + 5 ) [ ( 2x - 1 )² - 16 ] <=> ( x + 5 ) { [ ( 2x - 1 ) - 4 ] * [ ( 2x - 1 ) +4 ] } <=> ( x + 5 )( 2x - 5 )( 2x +3 )

Sper ca ti-am fost de ajutor ^^