Question

find the value of2a^2-ab-3b^2-9 if a = 3 and b= 2​

Answer 1

Answer:

-9.

Step-by-step explanation:

$2a {}^{2} - ab - 3b {}^{2} - 9 \\ 2(3) {}^{2} - 3(2) - 3(2) {}^{2} - 9 \\ 18 - 6 - 12 - 9 \\ - 9$

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