Question

PRECISO PRA HJ FMMMLLLL!!

Resolva as equações abaixo, utilizando a fórmula de Bhaskara: a) x² -8x+ 12 =0 b) x² + 2x -8 =0 *

a) S= { 0, 3} b) S= { -2, 5}
a) S= { -3, 3} b) S= { 3, 9}
a) S= { 2, 6} b) S= { -4, 2}
a) S= { 2, 6} b) S= { 4, 7}​

Answer 1

a) S = {2,6} b) S = {-4,2}

a) x² -8x+ 12 =0, a = 1, b = -8, c = 12

∆ = b²-4ac

∆ = (-8)²-4(1)(12)

∆ = 64-48

∆ = 16

-b+-√∆\2a

-(-8)+-√16/2

8+-4/2

x' = 8-4/2 = 4/2 = 2

x" = 8+4/2 = 12/2 = 6

S = {2,6}

b) x² + 2x -8 =0, a = 1, b = 2, c = -8

∆ = b²-4ac

∆ = (2)²-4(1)(-8)

∆ = 4+32

∆ = 36

-b+-√∆\2a

-2+-√36/2

-2+-6/2

x' = -2-6/2 = -8/2 = -4

x" = -2+6/2 = +4/2 = 2

S = {-4,2}

✨ Boa noite ✨

27/08