Question

CALCULE: 5 (elevado a -x (elevado a 2) )+ 4 = 125

Answer 1

${5}^{ { - x}^{2} + 4 } = 125$
${5}^{ { - x}^{2} + 4} = {5}^{3}$
- x² + 4 = 3

- x² = 3 - 4

x² = 1

x = ±1

x' = -1 e x" = 1