Question 24
Matrices and DeterminantsIf |2 3; 5 3x| = |4 1; 3 2x|, find the value of x. (Determinants written row by row.)
- A.−6
- B.6
- C.−12
- D.12
Show the answer and explanation
Answer: A (−6)
Explanation
6x − 15 = 8x − 3, so −2x = 12 and x = −6.
If |2 3; 5 3x| = |4 1; 3 2x|, find the value of x. (Determinants written row by row.)
Answer: A (−6)
6x − 15 = 8x − 3, so −2x = 12 and x = −6.