Question

(a^2+3ab-7b^2)+(6a^2-9ab+b^2)
please answer​

Answer 1

Answer:

7a^2 + 12ab - 8b^2

Step-by-step explanation:

=> a^2+3ab-7b^2+6a^2+9ab+b^2

= a^2+6a^2 + 3ab+9ab - 7b^2+b^2

=>7a^2+12ab-8b^2