Question

(2a² + 4ab + b² ) - (a² - 3ab - b²) = ____​

Answer 1

Step-by-step explanation:

$= 2{a}^{2} + 4ab + {b}^{2} - ( {a}^{2} - 3ab - {b}^{2} ) \\ = 2 {a}^{2} + 4ab + {b}^{2} - {a}^{2} + 3ab + {b}^{2} \\ = { a}^{2} + 5ab + 2 {b}^{2}$

Answer 2

Answer:

a²+ 7ab + 2b²

(2a² + 4ab + b² ) - (a² - 3ab - b²)

= (2a²-a²) + (4ab - (-3ab)) + ( b²-(-b²))

=a² + (4ab+ 3ab) + (b²+ b²)

= a²+ 7ab + 2b²

this is the easiest way to do this question

hope this helps you