Please help!

First one

Notice that the last term  has to be  "+25"

So....we can eliminate  A and D  because their final terms  will yield  " -25"

Since all therr terms of the polynomial are positive, the factors will only have a "+" involved

Look  at C

(2x + 5) (x + 5)   = 2x^2 + 5x + 10x + 25  = 2x^2 + 15x + 25

So....this is the correct choice......

Second one

To find out what the original expression was under the radical, we can evaluate this :

( 2^3)*12  * (a^3)^3  *  (b^2)^3 * b   =

8*12  * a^9  * b^6*b =

96a^9b^7

So   "A" is correct