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Question Number 202584 by cortano12 last updated on 30/Dec/23
$$\:\:\: \\ $$
Answered by dimentri last updated on 30/Dec/23
$$\mathrm{2}\:\begin{pmatrix}{\mathrm{m}}\\{\mathrm{2}}\end{pmatrix}\:−\:\mathrm{4m}\:=\:\mathrm{84} \\ $$$$\:\mathrm{m}^{\mathrm{2}} −\mathrm{5m}−\mathrm{84}\:=\:\mathrm{0} \\ $$$$\:\mathrm{m}\:=\:\mathrm{12}\: \\ $$