Bonjour j’ai besoin d’aide pour cet exo svp :) il faut supprimer les parenthèses et réduire
A = (5a + 3) + ( 2a + 6);
B = (3b+ 5)-( 6a-4);
C = 7a+ 6-(2a-4);
D =(7a+6) + (3a +6);
E = ( 7t-9)- (-10t+12+ 3t);
F = (45+ m) - ( m² + 45 m-3);
G = ( 6y-12)+( 12 y² -3y+1).
A = (5a + 3) + ( 2a + 6);
B = (3b+ 5)-( 6a-4);
C = 7a+ 6-(2a-4);
D =(7a+6) + (3a +6);
E = ( 7t-9)- (-10t+12+ 3t);
F = (45+ m) - ( m² + 45 m-3);
G = ( 6y-12)+( 12 y² -3y+1).
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A = (5a + 3) + ( 2a + 6);
= 5 a + 2 + 2 a + 6
= 7 a + 8
B = (3b+ 5)-( 6a-4);
= 3 b + 5 - 6 a + 4
= 3 b - 6 a + 9
C = 7a+ 6-(2a-4);
= 7 a + 6 - 2 a + 4
= 5 a + 10
D =(7a+6) + (3a +6);
= 7 a + 6 + 3 a + 6
= 10 a + 12
E = ( 7t-9)- (-10t+12+ 3t);
= 7 t - 9 + 10 t - 12 - 3 t
= 14 t - 21
F = (45+ m) - ( m² + 45 m-3);
45 + m - m² - 45 m + 3
= - m ² - 44 m + 48
G = ( 6y-12)+( 12 y² -3y+1).
= 6 y - 12 + 12 y² - 3 y + 1
= 12 y² + 3 y - 11