Question

Resolva em Bhaskara:
A) x²-5x+6=0 -----> Resposta= {2,3}
B) x²-9=0 -------> Resposta= {-3,3}

Answer 1

delta = b^2-4ac
x= (-b+-vdelta)/2a

a) x^2-5x+6= 0
a= 1 b= -5 c= 6
(-5)^2 -4.1.6
25-24= 1

x= (-(-5)+-v1)/2.1

x'
(5+1)/2
6/2= 3

x''
(5-1)/2
4/2
2


b) x^2-9= 0
x^2= 9
x= +-v9
x= -3,3