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/a / = b ↔ a = b v a = - b
/x² - 12x - 16/ = 8
x² - 12x - 16 = 8 v x² - 12x - 16 = - 8
x² - 12x - 16 - 8 = 0 ∨ x² - 12x - 16 + 8 = 0
x² - 12x - 24 = 0 ∨ x² - 12x - 8 = 0
x = [- ( -12 ) ±√(-12)² - 4(1)(-24)]/2 ∨ x= [ - ( -12) ±√12² - 4(1)(-8)]/2
x = [ 12 ± √144 + 96]/2 ∨ x = [ 12 ±√144 +32]/2
x = [12 ±√240]/2 v x = [ 12 ± √176]/2
x = [12 ± √16*15]/2 v x = [12 ± √16 * 11]/2
x = [12 ± 4√ 15]/2 ∨ x = [ 12 + 4√11]/2 Simplificas el 2
x = [6 ± 2√15] v x = [6 + 2√11]
x1 = (6 + 2√15) ∨ x1 = ( 6 + 2√11)
x1 = 2(3 + √15) v x1 = 2(3 + √11)
x2 = 2(3 - √15) v x2 = 2(3 - √11)
Solucion.
[ 2(3 + √15) , 2(3 - √15) , 2(3 +√11), 2(3 - √11) ]