Question

Por favor me ajudem

Answer 1

2x² -8x + 5 = 0

a= 2
b= -8
c= 5

Δ= b² - 4* a * c
Δ= (-8)² -4*2*5
Δ= 64 -40
Δ= 24

-b +- √Δ / 2*a
-b +- √24 / 2*a
-b +- 4,89897948557 / 2*a

-(-8) +- 4,89897948557 / 2*2

x' = -(-8) + 4,89897948557 / 2*2
x' = 8 + 4,89897948557 / 4
x' = 12,8989794856 / 4
x' = 3,22474487139

x'' = -(-8) - 4,89897948557 / 2*2
x" = 8 - 4,89897948557 / 4
x" = 3,10102051443 /4
x" = 0,7752551286075

S{ 3,22474487139 e 0,7752551286075}

"posse reduzir a 2 depois da virgula"