bonjour
A = x² + 3 x + 4 x + 12
= x² + 7 x + 12
B = 15 z + 18 z² + 20 + 24 z
= 18 z² + 39 z + 20
C = 2 y² + 8 y + 6 y + 24
= 2 y² + 14 y + 24
D = 21 t + 35 t² + 24 + 40 t
= 35 t² + 61 t + 24
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bonjour
A = x² + 3 x + 4 x + 12
= x² + 7 x + 12
B = 15 z + 18 z² + 20 + 24 z
= 18 z² + 39 z + 20
C = 2 y² + 8 y + 6 y + 24
= 2 y² + 14 y + 24
D = 21 t + 35 t² + 24 + 40 t
= 35 t² + 61 t + 24