Question

question given the matrix equation below, what is the value of cd? 4, - 3, 2, 8+c, 5, 0, d=9, 2, 2, 12 a - 20 b 5 c 9 d 20

Explanation:

Step1: Add corresponding elements

For the top - left elements: $4 + c=9$, so $c = 9 - 4=5$.

Step2: Add corresponding elements

For the bottom - left elements: $8 + d=12$, so $d=12 - 8 = 4$.

Step3: Calculate the product

We need to find $cd$, substituting $c = 5$ and $d = 4$, we get $cd=5\times4 = 20$.

Answer:

D. 20