Question

Preciso resolver essas equações: Ajuda pfv
a) x²+3x-28=0

b) 3x²-4x+1=0

c) 2x²+7x+6=0

Answer 1

x²+3x-28=0
Δ=9+112
Δ=121

x´=-3+11/2
x´=4

x´´=-3-11/2
x´´=-7

(4,-7)

b) 3x²-4x+1=0
Δ=4

x´=4+2/6
x´=1

x´´=4-2/6
x´´=1/3

(1,1/3)

c) 2x²+7x+6=0
Δ=1

x´=-7+1/4
x´=-3/2

x´´=-7-1/2
x´´=-4

(-3/2,-4)