Sos, help me ples ,admin help

Question

Sos, help me ples ,admin help

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Answer 1

M^2+10m-4m+9 / (9-m^2)=m^2+6m+9 / 9-m^2= (3+m)^2 / (3-m)*(3+m)=(3+m) / (3-m).