Question

1) a (b - c) (b + c) – dlc – b).​

Answer 1

Answer:

ab^2-ac^2-cd+bd

Step-by-step explanation:

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

a(b^2-c^2)=ab^2-ac^2

-d(c-b)

-cd+bd

ab^2-ac^2-cd+bd

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