Question

(3x2-xy+2y2)+(7x2-xy-1)

Answer 1

3х²-ху+2у²+7х²-ху-1=10х²-2ху+2у²-1
я думаю так

Answer 2

To simplify the expression (3x^2 - xy + 2y^2) + (7x^2 - xy - 1), we can combine like terms.

Starting with the x^2 terms, we have: 3x^2 + 7x^2 = 10x^2

Moving on to the xy terms, we have: -xy - xy = -2xy

Finally, combining the y^2 terms, we have: 2y^2 - 1

Putting it all together, the simplified expression is: 10x^2 - 2xy + 2y^2 - 1