Question

Add: 5x2 – 3xy + 4y2 – 9 and 7y2 + 5xy – 2x2 + 13​

Answer 1

Answer:

3x²+2xy+11y²+4

Step-by-step explanation:

5x2 – 3xy + 4y2 – 9 and 7y2 + 5xy – 2x2 + 13

=(5x²-3xy+4y²-9)+(7y²+5xy-2x²+13)

=5x²-3xy+4y²-9+7y²+5xy-2x²+13

=3x²+2xy+11y²+4

Answer 2

5x

2

−3xy+4y

2

−9+7y

2

+5xy−2x

2

+13

=5x

2

−2x

2

−3xy+5xy+4y

2

+7y

2

−9+13

=7x

2

+2xy+11y

2

+4