Est ce que vous pouvez maider a calculer sans poser doperation et sans calmcultette grace aux identiés remarquable en detaillant: 47²   62²   67x73


Puis factorizer en detaillant a laide des identités ermarquables:
P=16a²+24a+9

A=16y²-8y+1 

L==16-64b²

R=16x²-49

S=9a2+42a+49

T=36-24b+4b²

U=16x²-81y²
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