Which of the following is the complete factorization of 25a2 - 100? 5(5a - 2)(5a + 2) (5a - 2)(5a + 2) 25(a - 2)(a + 2)

25(a - 2)(a + 2)

Step-by-step explanation:

To factor, use the GCF to simplify the expression. The greatest common factor is the greatest number which multiplies into both terms 25 and 100. 25 is that number. So we write:

This expression has the the form of a difference of squares where 4 is b squared. As such, it will factor into the form (a-b)(a+b).

So we write:

e.

step-by-step explanation:

because there are always 10 numbers in a phone number.