[tex]\huge\bold\green{answer}[/tex]
[tex]\\ \sf\longmapsto \: a( + 2 + 3) + b( - 3 - 1) + c( + 3 - 2) + d( - 4 + 2) \\ [/tex]
[tex]\\ \sf\longmapsto \: + 5a - 4b + c \: - 2d \: [/tex]
Answer:
=-2a-3b+3c-4d+3a-b-2c+2d
collect like terms
=-2a+3a-3b-b+3c-2c-4d+2d
=a-4b+c-2d
