When multiplying a 2 x 2 matrix using Strassen fast matrix multiplication to result in a 2x2 matrix of C1,1 and C1,2 on the top row and C2,1 and C2,2 on the second row, how can C1,1 go from = (A1,2 - A2,2) * B2,1 - A2,2 * B2,2 - A1,1 * B1,2 to where C1,1 then = (A1,2 -A2,2) * (B2,1 + B2,2) - A1,2* B2,2 - A1,1*B1,2?? I am missing something with how the B2,2 is handled. Please show all steps. Thank you!!!!

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.