Question

Resolva as equação de 2 grau:1) 12x2-60=02) 7x2-448=03) 100x2-200x=0

Answer 1

Boa noite

1) 

12x² - 60 = 0 

x² = 60/12 = 5

x1 = -√5
x2 = +√5 

2)

7x² - 448 = 0 
x² = 64 

x1 = -8
x2 = +8 

3)

100x² - 200x =  0
x² - 2x = 0
x*(x - 2) = 0

x1 = 0
x2 = 2