Solve ax² + bx + c = 0 and inspect the discriminant.
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A USB-C and NFC security key supporting FIDO2/WebAuthn and FIDO U2F authentication.
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x² − 5x + 6 = 0 has roots 2 and 3.
Real roots only; negative discriminants are reported explicitly.
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Check the unit for each field. Use a decimal point without thousands separators in numeric fields. A blank value is not the same as zero. Verify important results independently.
Solve ax + by = c and dx + ey = f with a uniqueness check.
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