Question

Dê a solução: A) 2x² - 32 = 0 B) 4x² - 10x = 0 C) 4x² - 10x = 0

Answer 1

a) 0² - 4.2.-32
0 + 256
256
x= -0+/- √256/2.2

x1= 0 + 16/2 = 16/2 = 8
x2 = 0 - 16/2 = -16/2 = -8


b) -10² - 4.4.0
100 + 0
100

x= - 10 +/- √100/2.4

X1= -10 + 10 / 8 = 0/8 = 0
X2= -10 - 10/8 = -20/8 = -5/2 ou -2,5

c) igual a B