Explications étape par étape:
1) 10×3=30. 10²+30=130. 130×2=260
2) -5×3=-15. -5²+15= -125+15= -110. -110×2=-220
3) 2/3 ×3= 6/3 = 2. (2/3)² +2 =4/9+2=4/9+18/9=22/9
22/9×2=44/9
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Explications étape par étape:
1) 10×3=30. 10²+30=130. 130×2=260
2) -5×3=-15. -5²+15= -125+15= -110. -110×2=-220
3) 2/3 ×3= 6/3 = 2. (2/3)² +2 =4/9+2=4/9+18/9=22/9
22/9×2=44/9