How do you solve using completing the square method $x^2+2x=9$ ?

Question

How do you solve using completing the square method $x^2+2x=9$ ?

1 Answer

Impact of this question

2605 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-03-30T13:51:33

$x = - 1 +- sqrt10$

Explanation:

$x^2 + 2x = 9$
$x^2 + 2x + 1 = 9 + 1$
$(x + 1)^2 = 10$
Take the square root of both sides:
$x + 1 = +- sqrt10$
The 2 real roots are:
$x1 = - 1 + sqrt10$
$x2 = -1 - sqrt10$

Science

Math

Humanities

... and beyond

How do you solve using completing the square method $x^2+2x=9$ ?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do you solve using completing the square method x^2+2x=9x^2+2x=9?

1 Answer

Explanation:

Related questions

Impact of this question

How do you solve using completing the square method $x^2+2x=9$ ?