alleryFor x² − 6x + 9 = 0, find D and the nature of roots.
AD<0, no real roots
BD>0, distinct roots
CD=36, distinct roots
DD=0, equal roots
Answer & Solution
Correct answer: D. D=0, equal roots
D = 36 − 36 = 0. The equation has equal real roots (x = 3 twice).
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