Question

Tìm đa thức Q, biết:
a) Q - (5x² - xyz)= xy + 2x² - 3xyz + 5
 

Answer 1

\(Q-\left(5x^2-xyz\right)=xy+2x^2-3xyz+5\)

\(\Leftrightarrow Q=xy+2x^2-3xyz+5+5x^2-xyz\)

\(\Leftrightarrow Q=7x^2+xy-4xyz+5\)

Answer 2

\(Q-\left(5x^2-xyz\right)=xy+2x^2-3xyz+5\\ Q=xy+2x^2-3xyz+5+5x^2-xyz\\ Q=7x^2+xy-4xyz+5\)