Efraín es un vendedor de celulares, cada equipo cuesta 7500 pesos, el cuenta con su propia línea telefonica y tiene dos métodos
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ANSWER
Step 3
EXPLANATION
The given polynomial expression is:
Fatau correctly expanded the parenthesis in the first step.
Fatau also correctly grouped the like terms to obtain:
Fatau committed a mistake at the third step.
Instead of obtaining,
He mistakenly got:
