Which is equivalent to the following expression? (3x^2+5xy−2y^2)+(x^2+3xy−y^2)
The expression (3x^2+5xy-2y^2)+(x^2+3xy-y^2) is equivalent to (3x^2 + x^2) + (5xy + 3xy) + (-2y^2 - y^2).
Combining like terms, we get 4x^2 + 8xy - 3y^2.
Therefore, 4x^2 + 8xy - 3y^2 is equivalent to the given expression.