Question

Alguem ajude pfv mat

Answer 1

__________________

A)

2x² - 5x + 3 = 0

x = -(-5) ± √(-5)² - 4(2)(3)

2(2)

x = 5 ± √25 - 24

4

x = 5 ± √ 1

4

x = 5 ± 1

4

x¹ = 3/2 ou 1,5

x² = 1

S = { 3/2 ; 1 }

______________________

B)

x² - 5x - 6 = 0

x = -(-5) ± √(-5)² - 4(1)(6)

2(1)

x = 5 ± √25 - 24

2

x = 5 ± √1

2

x = 5 ± 1

2

x¹ = 3

x² = 2

S = { 3 ; 2 }

_______________________

Att: MarcosPCV