Question

5- por f(x)=4x² - 4x + 32. Determine X, se houver, para que se tenha f(x)=3.​

Answer 1

$\Large\mathsf\displaystyle{}f\left(x\right) = {4x}^{2} - 4x + 32$

Vamos lá:

$\Large\mathsf\displaystyle{}f\left(3\right) = 4\cdot {3}^{2} - 4\cdot3 + 32 \\ \Large\mathsf\displaystyle{}f\left(3\right) = 4\cdot9 - 4\cdot3 + 32 \\\Large\mathsf\displaystyle{}f \left(3\right) = 36 - 4\cdot3 + 32 \\ \Large\mathsf\displaystyle{}f\left(3\right) = 36 - 12 + 32 \\ \Large\mathsf\displaystyle{}f\left(3\right) = 24 + 32 \\ \Large\mathsf\displaystyle{}f\left(3\right) = 56 \\ \Large\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{ f\left(3\right) = \boxed{56} }}}\end{gathered} }$

$\displaystyle\text{ \begin{gathered} \underline{\boxed{\boldsymbol{{ \red{Bons}} \blue{\:Estudos}}}}\end{gathered} }$