1lim(√x-3)(√x-3)=lim(∛x+3)=∛9+3=3+3=62lim(x-2)(x-3)/(x-2)(x+2)=lim(x-3)/(x+2)=(2-3)/(2+2)=-1/4x²-5x+6=0x1+x2=5 U x1*x2=6⇒x1=2 U x2=33lim(4x+7)(x+2)/(x-2)(x+2)=lim(4x+7)/(x-2)=(-8+7)/(-2-2)=-1/(-4)=1/44x²+15x+14=0D=225-224=1x1=(-15-1)/8=-2 U x2=(-15+1)/8=-7/44lim[(√(x+7)-4)(√(x+7)+4)]/[(x-9)(√(x+7)+4)]=lim(x+7-16)/[(x-9)(√(x+7)+4)]==lim1/(√(x+7)+4)=1/(√(9+7)+4=1/(4+4)=1/8