how do i do the problem (2+5) squared?

Question

jhannybean · Answer

is it $\sqrt {2+5}$?

anonymous · Answer

no, it is (2+5) and then the 2 outside the parentheses to sqaure it. 
i know the answer is 49 im just confused as to how i get that i cant figure it out

anonymous · Answer

$$(a+b)^{2} = a^2 + 2ab + b^{2}$$

useful to know when you have unknown variables, like (x +2)^2. the equation holds for any a and b

jhannybean · Answer

Hmm....$\sqrt{(2+5)^2}$? that would be $$\large \sqrt{7^2}=\sqrt{49}$$

jhannybean · Answer

and i'll let you figure that out :)

anonymous · Answer

ah thank you!

jhannybean · Answer

no problem, and good explaining Euler

anonymous · Answer

4 squared plus 8 squared plus 2 squared is 32, but how do  get that?

anonymous · Answer

i got 80 adding all of those together so i am confused

anonymous · Answer

PEMDAS

jhannybean · Answer

$$\large 4^2+8^2+2^2$$ This does not = 32. 

(4)(4)+(8)(8)=(2)(2)

jhannybean · Answer

multiply all those out and then add them all together.

anonymous · Answer

the back of my book says its 32 so the book is totally wrong

jhannybean · Answer

Maybe :\ unless there is more to the problem?

anonymous · Answer

no there is not any more to the problem

jhannybean · Answer

Yeah then i believe the book is wrong. That cannot possibly be 32.

jhannybean · Answer

Anything else? :)

anonymous · Answer

i know lol my book is trying to confuse me

jhannybean · Answer

xD