Question

If the value of the determinant
4 m
2 7
is 34.

Answer 1

Answer:

m = -3

Step-by-step explanation:

hello friend

value of determinant can be calculated by ad - bc

for 2×2 matrix

like | a b |

| c d | is ad-bc

by comparing we get a=4 b = m c = 2 d = 7

given determinant is 34

such that ad-bc = 34

4(7) - 2m = 34

28 - 2m = 34

-2m = 6

m = -6/2 = -3

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