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vovikov84 [41]
3 years ago
6

PLEASE HELP Problem down below

Mathematics
1 answer:
Slav-nsk [51]3 years ago
6 0

Answer:

50unit^{2}

Step-by-step explanation:

Δ=

||\frac{1}{2} \left[\begin{array}{ccc}1&1&1\\7&9&1\\15&3&1\end{array}\right]||= ||-50||=50unit^{2}

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