Find the discriminant of each of the following equations:
1 – x = 2x2
Given: 1 – x = 2x2
2x2 + x – 1 = 0
Comparing with standard quadratic equation ax2 + bx + c = 0
a = 
, b = 1, c = – 1
Discriminant D = b2 – 4ac
= (1)2 – 4.2. – 1
= 1 + 8 = 9
1
Find the discriminant of each of the following equations:
1 – x = 2x2
Given: 1 – x = 2x2
2x2 + x – 1 = 0
Comparing with standard quadratic equation ax2 + bx + c = 0
a = , b = 1, c = – 1
Discriminant D = b2 – 4ac
= (1)2 – 4.2. – 1
= 1 + 8 = 9