Question

preciso pra hj vale nota 5 – { +3 – [(+2)² -(-5)² + 6 – 4 ]}

Answer 1

Espero ter ajudado.

$5-\left\{3-\left[\left(2\right)^2-\left(-5\right)^2+6-4\right]\right\}$

Primeiramente resolvemos os parênteses.

$3-\left[\left(2\right)^2-\left(-5\right)^2+6-4\right]\\\\3-\left(-19\right)\\\\=22$

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$5-22\\\\=-17$