Question

Find the value of discriminant of the following equation 1) 2x2+x1=0. 2) x2-6X+7=0​

Answer 1

First question

$2x {}^{2} + x + 1 \\ here \: \: a = 2. \: \: \: b = 1. \: \: \: c = 1 \\ discriminant = b {}^{2} - 4ac = 1 - 8 = - 7 \: \: \: \: ans.$

For second

$x {}^{2} - 6x + 7 = 0 \\ here \: \: a = 1. \: \: \: b = - 6. \: \: \: c = 7 \\ discriminant = b {}^{2} - 4ac = 36 - 28 = 8 \: \: \: ans.$