Răspuns :
Răspuns:
N=(³⁾1-2/3)⁻³
N=(3/3-2/3)⁺³
N=(1/3)⁻³
N=1/(1/3)³
N=3³
____________
x²-7x+12=x²-3x-4x+12=x(x-3)-4(x-3)=(x-4)(x-3)
______________
P(ABC)=56cm
AC=20cm
AB+BC=P(ABC)-AC=56-20=36 cm
P(ABCD)=36·2=>P(ABCD)=72 cm
Răspuns:
N=(³⁾1-2/3)⁻³
N=(3/3-2/3)⁺³
N=(1/3)⁻³
N=1/(1/3)³
N=3³
____________
x²-7x+12=x²-3x-4x+12=x(x-3)-4(x-3)=(x-4)(x-3)
______________
P(ABC)=56cm
AC=20cm
AB+BC=P(ABC)-AC=56-20=36 cm
P(ABCD)=36·2=>P(ABCD)=72 cm