Question

7x ao quadrado+13x-2=0 (formula de Bhaskara).

Answer 1

a= 7
b= 13
c=-2
delta ∆= b² -4.a.c
∆ = 13² -4.7. (-2)
∆ = 169 + 56= 225

Bhakara x= -b -/+ √∆ ÷ 2. a
x = - 13 -/+ √225 ÷ 2.7
x= -13-/+ 15 ÷ 14
x'= -13 + 15 ÷ 14 = 2 ÷ 14 = 0,14
x''= -13 - 15 ÷ 14 = 28 ÷14 = 2