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NDA · Maths · Quadratic Equations
NDA Quadratic Equations — Formulas 1
Question
1
of 18
1.
What is the arithmetic mean (AM) of the roots of
a
x
2
+
b
x
+
c
=
0
ax^2 + bx + c = 0
a
x
2
+
b
x
+
c
=
0
?
A
AM
=
−
b
a
\text{AM} = -\tfrac{b}{a}
AM
=
−
a
b
B
AM
=
b
2
a
\text{AM} = \tfrac{b}{2a}
AM
=
2
a
b
C
AM
=
−
b
2
a
\text{AM} = -\tfrac{b}{2a}
AM
=
−
2
a
b
D
AM
=
−
c
2
a
\text{AM} = -\tfrac{c}{2a}
AM
=
−
2
a
c
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