Question

(x³+2x²)-(x+1)-(x²-x)+(4-x³)=x²+3 Довести тотожність

Answer 1

(x³+2x²)-(x+1)-(x²-x)+(4-x³)=x²+3

x³+2x²-x-1-x²+x+4-x³=x²+3

x²+3=x²+3