Select the correct answer.
Which matrix is the product of a 3 × 3 identity matrix and the scalar 3?

Option C:

Solution:

3 × 3 identity matrix is

Scalar element = 3

Product of 3 × 3 identity matrix and scalar 3 is

3 multiplied into inside the matrix, we get

The product of 3 × 3 identity matrix and scalar 3 is

Option C is the correct answer.

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

9x