Question

equação biquadrada??
$4x - 9x + 2 = 0$
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Answer 1

4x⁴ - 9x² + 2 = 0

∆= 81-32=49 => √∆=7

x = 9+7/2.4=16/8= 2 => x'=±√2 ✓

x = 9-7/2.4=2/8=1/4 => x''=√1/4= ±1/2 ✓