Question

Test
(ii) a (b - c)(b + c) - d(c -b).​

Answer 1

Answer:

$a(b−c)(b+c)−d(c−b).</p><p></p><p>\sf{[ (x+y) (x-y) = x²-y² ]}[(x+y)(x−y)=x²−y²]</p><p></p><p>\sf{a(b²-c²-d(c-b)}a(b²−c²−d(c−b)</p><p></p><p>❛️️️️❛ \sf{ab²-ac²-cd+bd}ab²−ac²−cd+bd ❜❜</p><p></p><p>$