Question

$2 \sqrt{a {}^{3} } - a {}^{2} - 42a$
пж помогите
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Answer 1

$2\sqrt{a^3} - a^2-42a = 2a\sqrt{a} -a^2-42a = 2a*a^{\dfrac{1}{2}}-a^2-42a = 2a^{\dfrac{3}{2}}-a^2-42a} = \\\\= a(2a^{\dfrac{1}{2}}-a-42)}$