Question

resolva as seguintes equação do 2 grau x elevado 2 +8x+15​

Answer 1

a = 1, b= 8 c= 15 os coeficientes

Delta = b^2-4.a.c

Delta = 8^2-4.1.15

Delta = 64 - 60

Delta = 4 (Delta possitivo possui duas raízes)

x = -b+ ✓delta/2.a

x2 = -b- ✓delta/2.a

-8+2/2.1 = -3

-8-2/2.1= -5

x =

Answer 2

$x {}^{2} + 8x + 15$

A=1

B=8

C=15

X=-b±-√b²-4.a.c

_________________

2.a

x=-8+-√8²-4.1.15

__________________

2.1

X=-8±√64-60

__________________

2

X=-8±√4

_____________

2

X=-8±2

________

2

X'=-8+2 =>X'=-6 => x'= -3

_________ _________

2. 2

X"= -8-2

__________

2

X"=-10

_________

2

X"= -5