4x² – 16x – 9 = 0
x¹ = – 1/2, x² = 9/2
6x² + 5x – 4 = 0
x¹ = – 4/3, x² = 1/2
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Verified answer
4x² – 16x – 9 = 0
x¹ = – 1/2, x² = 9/2
6x² + 5x – 4 = 0
x¹ = – 4/3, x² = 1/2