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4 cards from this section. Quick, good the night before a test.
Find the discriminant of the equation x² - 4x + 4 = 0.
Calculate D = b² - 4ac.
What type of roots does the equation 2x² + x + 1 have?
Check the sign of the discriminant.
If the discriminant D > 0, how many distinct roots do we have?
Remember the conditions for distinct, equal, or no roots.
True or False: The quadratic equation can have more than two roots.
Consider the definition of a quadratic.
Find k such that the roots of the equation x² + kx + 16 = 0 are equal.
Substitute into the discriminant formula.
Determine if x² + 5x + 6 can be factored into real roots, examine D and solve.
Evaluate if it can be expressed in factors.
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