Question

Resolva as equações incompletas do 2° grau.

A) x²-25=0

B) x²+6=0

C) -x²+18x=0

D) -7x²+63=0

E) -49x²+1=0

Answer 1

Boa tarde

A) x-25=0  , x² = 25,  x1 = -5, x2 = 5

B) x²+6=0,  x² = -6 , x1 =  -√6k, x2 = √6i

C) -x²+18x=0,  x² - 18x = 0, x*(x - 18) = 0, x1 = 0, x2 = 18 

D) -7x²+63=0,  x² = 9, x1 = -3, x2 = 3

E) -49x²+1=0,  x1 = -1/7 , x2 = 1/7