Question

Help 15 points

Find the product. (7r – 8)2

(a) 49r2 – 112r + 64

(b) 49r2 + 64

(c) 49r2 – 112r – 64

(d) 49r2 – 64r + 64

Answer 1

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

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:

Answer: 49 r^2 - 112 r + 64

Answer 2

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

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