15 points
find the product. (7r – 8)2

(a) 49r2 – 112r + 64

(b) 49r2 + 64

(c) 49r2 – 112r – 64

(d) 49r2 – 64r + 64

49 r^2 - 112 r + 64 thus A.

Step-by-step explanation:

Expand the following:

r (49 r - 112) + 64

r (49 r - 112) = r×49 r + r (-112):

-112 r + 49 r^2 + 64

r×49 r = 49 r^2:

 49 r^2 - 112 r + 64

The answer to your question is: letter A.  49r² - 112r + 64

Step-by-step explanation:

This is a binomial perfect square

                                                      (7r - 8)²

Process

1.- Square the first term  

                                       (7r)² = 49r²

2.- Twice the product of the terms

                                     2(7r)(-8) = 14r(-8) = -112r

3.- Square the second term

                                     (-8)² = 64

4.- Order the result

                                     49r² - 112r + 64                                      

abde or 1,2,4, 5 is the answer

step-by-step explanation: