FACTORISATION ET IDENTITÉS REMARQUABLES (3 ème)

Factorise chaque expression

D=9x²+30x+25
E= x²+10x+25
F=4t²+24t+36
G=9x²+64+48x
H=9+4x²-12x
J=x²-2x+1
K=y²-18y+81

Merci de m'aider et m'expliquer les calculs en détaille.

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