Resposta :
x² -7x -44=0
a= 1 b= -7 c= -44
▲= b² -4.a.c
▲= (-7)² -4.(1).(-44)
▲ = 49+ 176
▲ = 225
x= (-b ± √▲)
2.a
x= [-( -7) ± √225]
2.1
x= [+7 ± 15]
2
x'= [ 7+15] = 22 = 11
2 2
x"= [ 7-15] = -8 = - 4
2 2
S{-4 ; 11}
a= 1 b= -7 c= -44
▲= b² -4.a.c
▲= (-7)² -4.(1).(-44)
▲ = 49+ 176
▲ = 225
x= (-b ± √▲)
2.a
x= [-( -7) ± √225]
2.1
x= [+7 ± 15]
2
x'= [ 7+15] = 22 = 11
2 2
x"= [ 7-15] = -8 = - 4
2 2
S{-4 ; 11}