Question

If $({:(1, 0),(0, 1):})({:(a, b+c),(b-c, d):}) = ({:(4, -5),(3, 2):})$, then (a-b) + (c-d)=____.
A. -2
B. 9
C. 2
D. -1

Answer 1

Correct Answer - D
Apply matrix multiplication concept and then equate the corresponding elements.