Срочно!!!) №908 под буквами в, д) смотрите вложения)
x^2-2mx+3x-6m/x^2+2mx+3x+6m=x(x-2m)+3(x-2m)/x(x+2m)+3(x+2m)=(x-2m)(x+3)/(x+2m)(x+3)=x-2m/x+2m16a^2-8ab-b^2/16a^2-b^2=(4a-b)^2/(4a-b)(4a+b)=4a-b/4a+b
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x^2-2mx+3x-6m/x^2+2mx+3x+6m=x(x-2m)+3(x-2m)/x(x+2m)+3(x+2m)=(x-2m)(x+3)/(x+2m)(x+3)=x-2m/x+2m
16a^2-8ab-b^2/16a^2-b^2=(4a-b)^2/(4a-b)(4a+b)=4a-b/4a+b