Sagot :
5 x ( -12 ) = -3 x 20
-8 x -3 = +2 x +12
+4 x -6 = -12 x 2
+ 5 x (-4) = -1 x 20
+ 2 x +10 = +5 x +4
(-2 ) x (-30 ) = (+12) x ( +5)
le premier lien
(+5)*(-12) relié a (-3)*(+20)
(-8)*(-3) relié a (+2)*(+12)
(+4)*(-6) relié a (-12)*(+2)
(+5)*(-4) relié a (-1)*(+20)
(+2)*(+10) relié a (+5)*(+4)
(-2)*(-30) relié a (+12)*(+5)
deuxième lien
pyramide rose :
-256
+16 -16
-4 -4 +4
-2 +2 -2 -2
pyramide bleu :
+1
-1 -1
-1 +1 -1
-1 +1 +1 -1