Question

Calcule o valor numérico de:

Answer 1

$\Large\boxed{\boxed{\boxed{{Ola\´\ }}}}}$

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a)

$\sf \sqrt{x + 8}\:\:>>\: \:\sqrt{8 + 8}\:\:>>\: \: \sqrt{16}\:\:>>\: \:\large\boxed{{\sf \large\boxed{{\sf 4{}}}{}}}$

b)

$\sf \sqrt{3x - 2}\:\:>>\: \:\sqrt{3.9 - 2}\:\:>>\: \: \sqrt{27 - 2}\:\:>>\:\:\sqrt{25}\:\:>>\:\:\large\boxed{{\sf \large\boxed{{\sf 5{}}}{}}}$

c)

$\sf M = {x}^{3} - 3x + 8 \\ \sf M = { - 2}^{3} - 3.( - 2) + 8 \\ \sf M = - 8 + 6 + 8 \\ \large\boxed{{\sf \large\boxed{{\sf \sf M = 6{}}}{}}}$