Practice problem
Evaluate: [8x6xy49y2xy−2x]−[8x2x9y7y−3xy−2x]\begin{bmatrix} 8x & 6xy & 4\\ 9y & 2xy & -2x\\ \end{bmatrix} - \begin{bmatrix} 8x & 2x & 9y\\ 7y & -3xy & -2x\\ \end{bmatrix}[8x9y6xy2xy4−2x]−[8x7y2x−3xy9y−2x]
[06xy−2x4−9y2y−xy−4x]\begin{bmatrix} 0 & 6xy-2x & 4-9y\\ 2y & -xy & -4x\\ \end{bmatrix}[02y6xy−2x−xy4−9y−4x]
[06xy−2x4−9y2y5xy0]\begin{bmatrix} 0 & 6xy-2x & 4-9y\\ 2y & 5xy & 0\\ \end{bmatrix}[02y6xy−2x5xy4−9y0]
[04xy4−9y2y−xy0]\begin{bmatrix} 0 & 4xy & 4-9y\\ 2y & -xy & 0\\ \end{bmatrix}[02y4xy−xy4−9y0]
[04xy4−9y2y−xy−4x]\begin{bmatrix} 0 & 4xy & 4-9y\\ 2y & -xy & -4x\\ \end{bmatrix}[02y4xy−xy4−9y−4x]
Type a concept, like “slope” or “photosynthesis”.