Question

Resolver essa conta x2+8x+15

Answer 1

2.1+8x+15
10x + 15
25x

Answer 2

Δ=b² -4.a.c
Δ=8² -4.1.15
Δ=64-60
Δ=4

-b2±√Δ
2,a

-8²±√4
2,1

-64±2
2

x´=-64+2= -62= -31
       2           2

X"=-64-2= -66= -33
          2        2
X´=-31
X"= -33