Sagot :
N= (-2+1/-2) ² - (-2-1/-2) ²=(-1/-2)²-(-3/-2)²=(1/2)²-(3/2)²=1/4-9/4=-8/4=-2
(-2+1/-2) ² - (-2-1/-2) ²
=(-4/2-1/2)²-(-4/2+1/2)²
=(-5/2)²-(-3/2)²
=25/4-9/4
=16/4
=4
=(-4/2-1/2)²-(-4/2+1/2)²
=(-5/2)²-(-3/2)²
=25/4-9/4
=16/4
=4