Question

S.O.S


f(x) = -x² + 4​

Answer 1

Resposta:

x' = 2

x" = -2

Explicação passo-a-passo:

$- {x}^{2} + 4 = 0 \\ {x}^{2} = 4 \\ x = \sqrt{4} \\ x1 = 2 \\ x2 = - 2$

Answer 2

$\bf{f(x) = - \: x {}^{2} + \: 4 }$

$a \: = \: 1 \\ b \: = \: 0$

$\bf{x = - \: \frac{0}{2 \times ( - 1)} }$

$x = 0$

$\bf{f(x) \: = \: - \: x {}^{2} \: + \: 4 } \\ x = 0 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

$\bf{f(0) \: = \: 4}$

$\large \bf{ \blue{ \boxed{ \boxed{\boxed{(0,4)}}}}}$