Question

resolva a equação : x²+x-12=0​

Answer 1

Resposta:

Δ=1² -4 .1.(-12)

Δ=1- 4.(-12)

Δ=1+48

Δ=49

x= - 1±√Δ / 2 .1

x=-1 ±√49 / 2

x= -1± 7/ 2

x=-1+7/2

x=6/2= 3

x=-1-7/2

x=-8/2= -4