Sagot :
A = ( a+6 )²
A = a² + 12a + 36
B = ( t + 10 )²
B = t² + 20t + 100
C = ( 5p + 4 )²
C = 25p² + 40p + 16
D = ( 5x + 2)²
D = 25x² + 20x + 4
E = ( 4x + 7 )²
E = 16x² + 56x + 49
F = ( 1,5b + 3.4 )²
F = 2,25b² + 10,2b + 11,56
G = ( 0,7 + 2z)²
G = 0,49 + 2,8z + 4z²
H = ( 1, 2 + y)²
H = 1,44 + 2,4y + y²
A = a²+12a+36
B = t² + 20t +100
C = 25p² + 40p + 16
D = 25x² +20x+4
E = 16x² +56x +49
F = 2.25b² + 10.2b + 11.56
G = 0.49 +2.8z +4z²
H = 1.44 + 2.4y +y²