How many real number or complex number roots does the following equation have?
y = 3x2 + 3x + 3
Hint
b2 is 9 and 4ac is 36.
Answer
Two complex number roots.
y = x2 + x + 1
b2 is 1 and 4ac is 4.
y = -x2 – 5x + 4
b2 is 25 and 4ac is -16.
Two real number roots.
y = -3x2 + 6x – 3
b2 is 36 and 4ac is 36.
One real number root.
y = x2 – 2x – 2
b2 is 4 and 4ac is -8.
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