Question

выполните действие
х^2-x+1-x^3/x+1;
m-3^n/8^n(m+n)-m+3^n/8^n(m-n)
3^c+7/c^2+7^c+c-7/7^c+49

Answer 1

1)x²-x+1 - x³/(x+1)=(x³+x²-x²-x+x+1-x³)/(x+1)=1/(x+1)
2)(3c+7)/c(c+7) +(c-7)/7(c+7)=(21c+49+c²-7c)/7c(c+7)=(c²+14c+49)/7c(c+7)=(c+7)²/7c(c+7)=(c+7)/7c