Question

x² + 2x = 8, comoleting the square. pls write it on a paper, thank you​

Answer 1

Step-by-step explanation:

Take

−

8

to the right:

x

2

+

2

x

=

8

Add and subtract

1

:

x

2

+

2

x

+

1

−

1

=

x

2

+

2

x

+

1

=

8

+

1

(

x

+

1

)

2

=

9

Root square both sides:

x

+

1

=

±

√

9

x

+

1

=

±

3

x

=

−

1

±

3

x

1

=

2

x

2

=

−

4