Question

(-2a + b - 3)^2 (expand)

Answer 1

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expand

$( - 2a + b - 3) {}^{2}$

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$\small \bf (a + b + c) {}^{2} = {a}^{2} + {b }^{2} + c {}^{2} + 2ab + 2bc + 2ac$

$4a {}^{2} + b {}^{2} + 9 - 4ab + 12a - 6b$