What is the sum of the polynomials? the 2 by 2 matrix row 1, blank 17 m minus 12 n minus 1 row 2, plus 4 minus 13 m minus 12 n

Add the polynomials by combining like terms: (17m − 12n − 1) + (4 − 13m − 12n). The m-terms give 17m − 13m = 4m, the n-terms give −12n − 12n = −24n, and the constants give −1 + 4 = 3. The sum is 4m − 24n + 3, choice A.

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