Question

-(-5bc)+(-4bd)+(+3cd)-(+5bd)-(-cb)+(-2cd)=

Answer 1

-(-5bc)+(-4bd)+(+3cd)-(+5bd)-(-cb)+(-2cd)
+5bc-4bd+3cd-5bd+cb-2cd
+5bc-4bd-5bd+3cd-2cd+cb
+5bc-9bd+cd+cb.

vc só pode somar ou subtrair temos semelhantes entre si.

Answer 2

-(-5bc)+(-4bd)+(+3cd)-(+5bd)-(-cb)+(-2cd)=
+ 5bc - 4bd + 3cd - 5bd +cb - 2cd =
+ 6bc - 9bd +cd