Question

Resolva as equações do 2° grau usando Bhaskara

B) x2+9x+18=0
C)X2+x-12=0

Answer 1

delta= b^2-4×a×c

delta=9^2-4×1×18

delta=81-72

delta=9

x=b+-√9÷2×a

x=9+- 3÷ 2×1

x1=9+3÷2

x1=12÷2

x1=6

x2=9-3÷2

x2=6÷2

x2=3