Question

2xao quadrado +x menos1=0​

Answer 1

Resposta:

2x

2

+x−1=0

Δ=1

2

−4∗2∗−1=9

x=

2∗2

−1+−

9

x

1

=

4

−1+3

=

4

2

=

2

1

x

2

=

4

−1−3

=−2