Resposta :

jjuuhsousa
x²+8x-240=0
a=1
b=8
c=-240

Delta=8²-4*1*-240
Delta=64+960
Delta=1024

x'=-8+V1024/2*1
x'=-8+32/2
x'=24/2
x'=12

x''=-8-32/2
x''=-40/2
x''=-20

Outras perguntas