QUESTION IMAGE
Question
reescribir sin paréntesis y simplificar. (7 - 6u)^2
Step1: Aplicar la fórmula $(a - b)^2=a^{2}-2ab + b^{2}$
Aquí $a = 7$ y $b = 6u$, entonces $(7-6u)^{2}=7^{2}-2\times7\times6u+(6u)^{2}$
Step2: Calcular cada término
$7^{2}=49$, $2\times7\times6u = 84u$ y $(6u)^{2}=36u^{2}$
Step3: Escribir la expresión simplificada
$49-84u + 36u^{2}$
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$36u^{2}-84u + 49$