Question

9
(i) a (a - 2) - b (b - 2)

Answer 1

Answer:

$\huge\underline\bold {Answer:}$

$= > a(a - 2) - b(b - 2) \\ \\ = a {}^{2} - 2a - b {}^{2} + 2b$

$= a {}^{2} - b {}^{2} + 2b - 2a$

$= (a + b)(a - b) + 2b - 2a$

By using identity a^2 - b^2.