Răspuns :
x^2+2x-3=x^2+2x+1-4=(x+1)^2-2^2
dif de patrate=(x+1+2)(x+1-2)=(x+3)(x-1)
dif de patrate=(x+1+2)(x+1-2)=(x+3)(x-1)
x²+2x-3
DESCOMPUNEM:
x²-x+3x-3 ; dam factor comun :x(x-1)+3(x-1); dam iar factor comun:
(x-1)(x+3)
DESCOMPUNEM:
x²-x+3x-3 ; dam factor comun :x(x-1)+3(x-1); dam iar factor comun:
(x-1)(x+3)