Question
4. Qual dos seguintes polinómios é igual a \( (x-5)^{2}-x^{2} \) ? \( \begin{array}{lll}\text { (A) }-25) & \text { (B) } 25 & \text { (C) }-10 x+25\end{array} \)
Ask by Bowers Lowe. in Portugal
Mar 19,2025
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Answer
A opção correta é (C) \(-10x + 25\).
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Mind Expander
Vamos simplificar a expressão \( (x-5)^{2}-x^{2} \). Primeiro, expandimos \( (x-5)^{2} \): \[ (x-5)^{2} = x^{2} - 10x + 25 \] Agora, substituímos na expressão original: \[ (x^{2} - 10x + 25) - x^{2} \] Os \( x^{2} \) se cancelam: \[ -10x + 25 \] Portanto, a resposta correta é \( \text{(C) } -10x + 25 \).