Question

Perfect square trinomial:
(a – b)2 = (a – b)(a – b) = a2 – 2ab + b2
Find the product of (k – 9)2 using the perfect square trinomial rule shown on the left.

The product (k – 9)2 can also be written as .
A. (k-9)(k+9)
B. (k-9)(k-9)
C. (K+9)(k+9)
The product is k2 – 9,18, or 81k+9, 18, or 81

Answer 1

B

Answer 2

can you pick one for the second choice

Answer 3

@DrOetker