which of the following represents quadratic enequatic?
a.
[tex]3x ^{2} + 4 - 5 = 0[/tex]

b.
[tex]x ^{2} - 8 \geqslant 3x[/tex]

c.
[tex]x ^{2} + 4x - 5[/tex]

d.
[tex]3x - 5 < 0[/tex]
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