Question

Алгебраические дроби

Answer 1

1)(3c+a)/4c-(a-7c)/4c=(3c+a-a+7c)/4c=10c/4c=2,5
2)2p/(p+3)+(3-p)/(p+3)=(2p+3-p)/(p+3)=(p+3)/(p+3)=1
3)x²/(x-4)-4x/(x-4)=(x²-4x)/(x-4)=x(x-4)/(x-4)=x
4)m/(m²-n²)-n/(m²-n²)=(m-n)/(m-n)(m+n)=1/(m+n)