Question

What must be subtracted from 3a²-6ab - 3b2-1 to get 4a²- 7ab – 4b² +1 ?​

Answer 1

it is an algebric expression so his answer is a^2 +ab+b2+1

Answer 2

Answer:

a² - ab - b² + 2

Step-by-step explanation:

1. So in this sum u take the second term first and put the second term in brackets

4a²- 7ab - 4b² + 1 - (3a²-6ab - 3b²-1)

2. Then you open the brackets

4a²- 7ab - 4b² + 1 - 3a²+ 6ab + 3b²+ 1

3. now take the like terms

4a²- 3a²- 7ab + 6ab - 4b² + 3b² + 1 + 1

4. which is:

= a² - ab - b² + 2

Hope you got it :)