Question

(8x^2−4y^2+6xy+5)−(3x^2−4y^2+5xy−3)

Answer 1

the required answer is :

5x^2+xy+8

Answer 2

8x^2-4y^2+6xy+5-3x^2+4y^2-5xy+3
(8x^2-3x^2)+(-4y^2+4y^2)+(6xy-5xy)+(5+3)
5x^2+0y^2+xy+8
=5x^2+xy+8