4. Factoriser les expressions suivants: a = 25 + 10x + x2
b=4x² + 4x + 1
c = 169 + 78x + 9x2
d = x2 + xt
e = x4 + x2
f = 9x6 + 6x3 + 1
g = x5 + x4 + x3 + x2 + x + 1
b=4x² + 4x + 1
c = 169 + 78x + 9x2
d = x2 + xt
e = x4 + x2
f = 9x6 + 6x3 + 1
g = x5 + x4 + x3 + x2 + x + 1
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