Question

responda usando a fórmula de bhaskara
a) 8x2 −8x+4=0
b)10x2 -4x-2=0​

Answer 1

___________

-b ± √b² - 4ac/2a

_

a)

8x² - 8x + 4 = 0

2x² - 2x + 1 = 0

-(-2) ± √(-2)² - 4(2)(1) / 2(2)

2 ± √4 - 8 / 4

2 ± √-4 / 4

2 ± 2i / 4

½ ± ½i

S = { Ñ pertence aos reais }

_

b)

10x² - 4x - 2 = 0

5x² - 2x - 1 = 0

-(-2) ± √(-2)² - 4(5)(-1) / 2(5)

2 ± √4 + 20 /10

2 ± √24 /10

2 ± 2√6 / 10

S = { 2 + 2√6/10 ; 2 - 2√6/10 }

__________________

Att: MarcosPCV