Question

(5a^2 - b^2) - (4a^2 + 3b^2) - (a^2 - 7b^2)

Answer 1

`(5a^2 - b^2) - (4a^2 + 3b^2) - (a^2 - 7b^2)=\\ 5a^2-b^2-4a^2-3b^2-a^2+7b^2=\\ 3b^2`

Answer 2

3b²

Explanation:

(5a² - b²) - (4a² + 3b²) - (a² - 7b²)

= 5a² - b² - 4a² - 3b² - a² + 7b²

• combine like terms

= 3b²