Home › UP Board Class 10 › Mathematics › Quadratic Equations › For x² − 6x + 9 = 0, find D and the nature of ro…
For 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).
Related questions
The study of inequalities is described as useful in solving problems in science and:A firm needing at least 6 units and at most 10 would write that as a:Which sign makes a statement an inequality rather than an equation?Unless stated otherwise, inequalities in that chapter are solved over the set of:The set of all values of the variable that make an inequality true is called its:Solving 4x plus 3 less than 6x plus 7 gives:When x is a real number in that inequality, the solution set is written as:When x is an integer in that inequality, the largest solution is: