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![\displaystyle -[-3]^2 - [4(-3) - 9(-2)] + 6[-2] \hookrightarrow -9 - [-12 + 18] - 12 \hookrightarrow -9 - 6 - 12 \\ \\ \boxed{-27}](/tpl/images/2447/7603/92d9c.png)
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-k^2-(4k-9n)+6n; k= -3 and n= -2...
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