1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
What re the roots of the equation $$\left| {{x^2} - x - 6} \right| = x + 2$$?
A
$$-$$2, 1, 4
B
0, 2, 4
C
0, 1, 4
D
$$-$$2, 2, 4
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The equation px2 + qx + r = 0 (where p, q, r all are positive) has distinct real roots a and b. Which one of the following is correct?
A
a > 0, b > 0
B
a < 0, b < 0
C
a > 0, b < 0
D
a < 0, b > 0
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
The number of real roots for the equation $${x^2} + 9\left| x \right| + 20 = 0$$ is
A
zero
B
one
C
two
D
three
4
NDA Mathematics 14th September 2025
MCQ (Single Correct Answer)
+2.5
-0.833
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For the following two (02) items:
Let $\alpha$ and $\beta $ be the roots of the quadratic equation
$(x^{2}+(\log _{0.5}(\alpha ^{2}))x+(\log _{0.5}(\alpha ^{2}))^{4}=0$
where $a ^ 2 \ne1$ and $\log _{0.5}(\alpha ^{2})>0$ Further, $\beta ^{2}=\alpha (\log _{\alpha ^{2}}(0.5))$
 
What is the relation between α and β 
1
α = 2β 
2
2α = β 
3
α = - 2β 
4
2α = -β