(b+c)(b-c) - b (b-2c)

Question

(b+c)(b-c) - b (b-2c)

Answer 1

(b+c)(b-c) -b (b-2c) = b^2-bc+cb-c^2-b^2+2cb=-c^2+2cb

Answer 2

,.......... б²-с²-б²-2сб