Question

qual o valor de x?
X²+8x - X : 4 - 16

Answer 1

Vamos là.

x² + 8x - x/4 - 16 = 0

4x² + 32x - x - 64 = 0

4x² + 31x - 64 = 0

delta

d = 31² + 4*4*64 = 1985

x1 = (-31 + √1985)/8

x2 = (-31 - √1985)/8