Question

Resolva as equacoes a seguir usando formula de bhaskara. Resolvam separadamente por favor.

A) x² + 2x - 3 = 0
B) 3x²+5x+2=0
C) 7x-x²-6=0
D)2x²+x=1
E)3x²-2x+1=0
F)4x²+12x+9=0

Answer 1

a) x²+2x-3= 0 a=1, b=2 e c=-3
∆= 2²-4.1.(-3)
∆= 4+12
∆= 16

x= -2±√16/2.1
x= -2±4/2

x'= -2+4/2= 2/2= 1
x"= -2-4/2= -6/2= -3