Which of the following expressions is equal to 3x squared +27

Question

Which of the following expressions is equal to        3x squared +27

freckles · Answer

you could factor 3x^2+27
both terms in 3x^2+27 have a common factor 3

anonymous · Answer

Which of the following expressions is equal to $$x^{2}+9$$

freckles · Answer

it is hard to tell since there are no expressions given for either 3x^2+27 or x^2+9
but 3x^2+27 is definitely not x^2+9
however 3x^2+27 is a multiple of x^2+9

anonymous · Answer

well the choices are 
(x+3i) (x-6i)
(x+3i) (x+3i)
(x-31) squared
(x+3i) squared

freckles · Answer

so you want to factor x^2+9

well
if you have
x^2+a^2
then you factor this as (x-ai)(x+ai)

freckles · Answer

I think you are missing a choice

freckles · Answer

or a choice has been incorrectly written

anonymous · Answer

(x-3i) squared is the (x-31) squared

freckles · Answer

x^2+a^2=(x-ai)(x+ai)
so
x^2+9=(      )(       )
use the above formula

anonymous · Answer

What is the result of isolation $$x^{2}$$ in the equation below? 
$$x^{2}$$ + $$(y-5)^{2}$$ = 30