Question

4(2a + b)^2 -(a - b)^2 factories

please tell answer​

Answer 1

Answer:

$4(2a + b) {}^{2} - {(a - b)}^{2}$

$= 4(4a²+b²+4ab)-(a²+b²-2ab) \\ = 16a {}^{2} + 4b {}^{2} + 16ab - a {}^{2} - b {}^{2} + 2ab \\ = 15a {}^{2} + 3b {}^{2} + 18ab$