Answer:
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Step-by-step explanation:
Using the law if indices
×
= 
Thus to simplify the expression add the 3 exponents
a(b + c) + b(c - a) + c(a - b) ← distribute parenthesis
= ab + ac + bc - ab + ac - bc ← collect like terms
= 2ac
Then the expression simplifies to
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$1,500
P/R $900 net price (P) trade discount rate is 40 percent. Must use
complement (100 percent – 40 percent) since the portion (net price)
represents 60 percent of the list price. $900/.60 = $1,500 (B)
Hope I helped