Element pl-matrix-input: Matrix algebra with complex values

Two matrices $A$ and $B$ are given as follows: 

1
2
A = [1.00+0.80j -0.70-0.20j -0.50+0.80j];
B = [0.70-0.10j -0.70-0.70j; 0.90-0.50j 0.20-0.40j; 0.60-0.40j -0.70-0.70j];

1
2
A = {{1.00+0.80j, -0.70-0.20j, -0.50+0.80j}};
B = {{0.70-0.10j, -0.70-0.70j}, {0.90-0.50j, 0.20-0.40j}, {0.60-0.40j, -0.70-0.70j}};

1
2
3
4
import numpy as np

A = np.array([[1.00+0.80j, -0.70-0.20j, -0.50+0.80j]])
B = np.array([[0.70-0.10j, -0.70-0.70j], [0.90-0.50j, 0.20-0.40j], [0.60-0.40j, -0.70-0.70j]])

1
2
A = matrix(c(1.00+0.80j, -0.70-0.20j, -0.50+0.80j), nrow = 1, ncol = 3, byrow = TRUE)
B = matrix(c(0.70-0.10j, -0.70-0.70j, 0.90-0.50j, 0.20-0.40j, 0.60-0.40j, -0.70-0.70j), nrow = 3, ncol = 2, byrow = TRUE)

1
2
3
4
from sympy import *

A = Matrix([[1.00+0.80j, -0.70-0.20j, -0.50+0.80j]])
B = Matrix([[0.70-0.10j, -0.70-0.70j], [0.90-0.50j, 0.20-0.40j], [0.60-0.40j, -0.70-0.70j]])

Find the product of these two matrices:

Correct answer

Student view placeholder

In student views this area is used for assessment and score info.
Tools

Staff information

Question

QID:
Title:
Element pl-matrix-input: Matrix algebra with complex values

Variant

Started at:
2026-08-04 21:50:17 (CDT)
Duration:
0s
Show/Hide answer 
{
  "C": {
    "_type": "complex_ndarray",
    "_dtype": "complex128",
    "_value": {
      "imag": [
        [
          1.3099999999999998,
          -1.2299999999999998
        ]
      ],
      "real": [
        [
          0.07000000000000012,
          0.5499999999999999
        ]
      ]
    }
  }
}
This box is not visible to students.
History
dec frac
rad deg