Question

निम्न में से कौन सा कथन सत्य नहीं है (1)mul vastvik hai , yadi b square 2 - 4 AC<0 (2) mul vastvik hai, yadi be scared to -4ac=0 (3) mul vastvik hai,yadi be scared to-4ac<0 (3) mul vastvik hai hi yadi be scared-4ac>0​

Answer 1

678827&8
9928828282
988887888
9878896788

Answer 2

SOLUTION

TO CHOOSE THE CORRECT OPTION

Which of the following statements is not true:

(A) roots are real, if b² - 4ac < 0

(B) roots are equal, if b² - 4ac = 0

(C) roots are not real, if b² - 4ac < 0

(D) roots are real if b² - 4ac > 0

EVALUATION

We know that for a given Quadratic equation

ax² + bx + c = 0

Discriminant is denoted by D and defined as

D = b² - 4ac

Now if

(i) roots are real when b² - 4ac ≥ 0

(ii) roots are equal when b² - 4ac = 0

(iii) roots are not real when b² - 4ac < 0

(iv) roots are real when b² - 4ac > 0

Hence the correct option is

(A) roots are real, if b² - 4ac < 0

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