Question

(X-4)^2 - ( raiz de 0,16) .10x

Answer 1

Boa dia

(x - 4)² - 10x * √(16/100)

x² - 8x + 16 - 10x*4/10
x² - 8x - 4x + 16

x² - 12x + 16 = 0

delta
d² = 144 - 64 = 80 = 16*5
d = 4√5

x1 = (12 + 4√5)/2 = 6 + 2√5
x2 = (12 - 4√5)/2 = 6 - 2√5