randRange(-2, 4, ROWS, COLS) randRange(-5, 5) "\\times" deepZipWith(2, function(a) { return a * SCALAR; }, MAT_A) matrixPad(SOLN_MAT, 3, 3) BLUE GREEN PINK printSimpleMatrix(MAT_A, MAT_A_COLOR) printMatrix(function(a) { var s = colorMarkup(SCALAR, SCALAR_COLOR); var b = colorMarkup(a, MAT_A_COLOR); return s + OPERATION + b; }, MAT_A) printSimpleMatrix(SOLN_MAT, SOLN_MAT_COLOR)
\Large{ \color{SCALAR_COLOR}{SCALAR} OPERATION PRETTY_MAT_A = {?} }

To multiply a matrix by a number, multiply each item of the matrix by the number.

\Large{PRETTY_HINT_MAT}

Now, simplify:

\Large{PRETTY_SOLN_MAT}
elem elem
2 2
2 3
3 1
3 2