Question

$(a - 3b)( - 3b + a)$
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Answer 1

Step-by-step explanation:

answer for your question is (a-3b)²

Answer 2

Step-by-step explanation:

$\qquad\bf{:}\longrightarrow (a-3b)(-3b+a)$

$\qquad\bf{:}\longrightarrow a(-3b+a)-3b(-3b+a)$

$\qquad\bf{:}\longrightarrow -3ba+a^2+3b^2-3ba$

$\qquad\bf{:}\longrightarrow a^2+3b^2-6ba$