Question

(a^2+3ab-7b^2)+(6a^2-9ab+b^2)​

Answer 1

Answer:

7a²-6ab-6b²

is the correct answer

Answer 2

Answer:

(a²+3ab-7b²)+(6a²-9ab+b²)

now, expand it

a²+3ab-7b²+6a²-9ab+b²

now,

combine like terms,

a²+6a²-7b²+b²+3ab-9ab

(a²+6a²)+(-7b²+b²)+(3ab-9ab)

(7a²)+(-6b²)+(-6ab)

7a²-6b²-6ab

Step-by-step explanation:

I hope that it will help you.