How do you solve using completing the square method $x^{2} - 4 x = 5$ $x^2 - 4x = 5$ ?

Question

How do you solve using completing the square method $x^{2} - 4 x = 5$ $x^2 - 4x = 5$ ?

1 Answer

Impact of this question

1217 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-06-23T11:43:08

$x = - 1, 5$ $x= -1, 5$

Explanation:

$x^{2} - 4 x = 5$ $x^2 - 4x = 5$
$x^{2} - 4 x - 5 = 0$ $x^2 - 4x - 5 = 0$
${(x - 2)}^{2} - 4 - 5 = 0$ $(x-2)^2 - 4 - 5 = 0$
${(x - 2)}^{2} - 9 = 0$ $(x-2)^2 - 9 = 0$
${(x - 2)}^{2} = 9$ $(x-2)^2 = 9$
$x - 2 = \pm 3$ $x-2 = pm 3$
$x = 2 \pm 3 = - 1, 5$ $x= 2 pm 3 = -1, 5$

Science

Math

Humanities

... and beyond

How do you solve using completing the square method $x^{2} - 4 x = 5$ $x^2 - 4x = 5$ ?

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 - 4x = 5x2−4x=5x^2 - 4x = 5?

1 Answer

Explanation:

Related questions

Impact of this question

How do you solve using completing the square method $x^{2} - 4 x = 5$ $x^2 - 4x = 5$ ?