Step-by-step explanation:
[tex]x \div 4 \leqslant 9 \div x[/tex]
[tex]x ^{2} \leqslant 36[/tex]
[tex]x {}^{2} - 36 \leqslant 0[/tex]
[tex]x {}^{2} { - 6}^{2} \leqslant 0[/tex]
[tex](x + 6)(x - 6) \leqslant 0[/tex]
[tex]x \leqslant - 6 \: \: or \: \: \: x \leqslant 6[/tex]
[tex] - 6 \geqslant x \leqslant 6[/tex]
From the explanation the correct answer is the last one from the question above
