Question

add: (5x^2-4y^2+2xy) and (-3xy+9x^2-7y^2)​

Answer 1

Step-by-step explanation:

=(5x^2-4y^2+2xy)+(-3xy+9x^2-7y^2)

=(5x^2+9x^2)+(-4y^2-7y^2)+(2xy-3xy)

=14x^2-11y^2-xy

Answer 2

Answer:

(5+9)x^2-(7+4)x^2+(2-3)xy

=14x^2-11x^2-xy