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Question
Determine the discriminant of the following:
x2 + 2x + 4 = 0
Sum
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Solution
Given:
x2 + 2x + 4 = 0
a = 1
b = 2
c = 4
The discriminant of a quadratic equation of the form:
ax2 + bx + c = 0
Use the discriminant formula
D = b2 − 4ac
= (2)2 − 4(1) (4)
= 4 − 16
= −12
Discriminant D = −12
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