Which of the following expressions is equal to -3x^2-12??!!! please help him

-3 ( x+2i) (x-2i)

Step-by-step explanation:

-3x^2-12

Factor out a -3

-3(x^2 +4)

Rewrite

-3 ( x^2 - -4)

-3 ( x^2 - (-2i)^2)  This is the difference of squares ( a^2 -b^2 ) = (a-b)(a+b)

-3 ( x- -2i) (x+2i)

-3( x+2i) (x-2i)

0.17 over 1

Step-by-step explanation:

So, first we have to find a comman factor. between 255, and 15 the GCF is 15, so 255 ÷ 15 = 17      So that is:

            255 ÷ 15 = 17                

Now we move the decimal into place so its $0.17 becaue 0.17 x 15 = 2.55