Solve using the perfect squares method: (2x+5)2=25

Question

Solve using the perfect squares method:  (2x+5)2=25

mathslover · Answer

Take square root both sides... 

$\sqrt{(2x+5)^2} = \pm \sqrt{25}$

mathslover · Answer

Can you simplify it ?

jadeishere · Answer

There's a sipler way to do this @mathslover ...

jadeishere · Answer

*simpler

mathslover · Answer

@Jadeishere - Yep sure! Please put up your method here. I'm glad that you put it up like this.

jadeishere · Answer

Well, in a standard form quadratic equation, you can simplify it to get 
 (2x+5)2=25
but then you could simplify THAT to get (2x + 5)^2 = 5^2
the easiest way to go about this is
2x + 5 = 25 or 2x + 5 = -5

jadeishere · Answer

My teacher showed me that when I was in 8th grade.

jjuden · Answer

so how would i finish cause my teacher never taught me that

jadeishere · Answer

well then just isolate the variable, like you would any other equation.
By the way, I meant 2x + 5  = 5 not 25

jjuden · Answer

ok

mathslover · Answer

That is what I going to do too @Jadeishere - 

$\sqrt{(2x+5)^2} = \pm \sqrt{25}$

So, 2x + 5 = 5 or -5. 

The one showed by your teacher is not having the step of square rooting both sides which is okay for the beginners.

jadeishere · Answer

Oh, sorry >.<