Question

(a+b)(2c+d)-(a+b)(c-d)
pakai cara yaaa !!!!

Answer 1

A(2c+d)+b(2c+d)-a(c-d)+b(c-d)
= 2ac+ad+2bc+bd-ac+ad+bc-bd
= (2ac-ac)+(ad+ad)+(2bc+bc)+(bd-bd)
= ac+2ad+3bc
ini sebisa saya, maaf kalo salah

Answer 2

(a+b)(2c+d)-(a+b)(c-d)
=(2ac+2bc+ad+bd)-(ac-ad+bc-bd)
=2ac+2bc+ad+bd-ac+ad-bc+bd
=ac+bc+2ad+2bd