Question

Poderiam dar a resposta de:

X²+12x-12=4??

Answer 1

Bom dia

x² + 12x - 16 = 0

delta

d² = 12² + 4"16

d² = 144 + 64 = 208 = 16*13

d = 4√13

x1 = (-12 + 4√13)/2 = -6 + 2√13

x2 = (-12 - 4√13)/2 = -6 - 2√13

Answer 2

X²+12x-12=4
x^2+ 12x - 12 - 4 = 0
x^2+ 12x - 16 = 0
a = 1; b =12; c = - 16
∆ = b^2-4ac
∆ = ( - 12)^2 - 4.1.(-16)
∆ = 144 + 64
∆ = 208
√∆ = √16.√13 = 4√13

x = [ - b +/- √∆]/2a
x = [ - 12 +/- 4√13]/2.1
x = [ - 12 +/- 4√13]/2

x ' = -12/2 + 4√13/2 = - 6 + 2√13
x" = -12/2 - 4√13/2 = - 6 - 2√13