Question

Resolva as equação do 2°grau:
A)x²-2x+3=-12+6x

Answer 1

x²-2X-6X=-12-3
x²-8X=-15
x²-8X+15

Delta= b²-4ac
Delta= (-8)² - 4*1*15
Delta= 16 - 60
Delta= -44

Answer 2

A) x² - 2 x + 3 = - 12 + 6 x
     x² - 2 x -6 x + 3 +12 =0
     x² - 8 x + 15 = 0
    Δ = b² - 4 . a . c
    Δ = (-8)² - 4 . 1 . 15
    Δ = 64 - 60
    Δ = 4

x = - b ± √Δ / 2 . a
x = + 8 ± √4 / 2.1
x = + 8 ±  2 / 2
x' = + 8 + 2 / 2 = 10/2 = 5
x" = + 8 - 2 / 2 = -6/2 = -3

x' = 5 e x" = -3