Find the sum of the zeroes for the quadratic equation (-2)x^2 +(-9)x – 1=0.
Answers
Answered by
0
Answer:
−
5
2
and
−
2
Explanation:
Use improved quadratic formula (Socratic Search)
y
=
2
x
2
+
9
x
+
10
=
0
Both roots are negative. (rule of signs)
D
=
d
2
=
b
2
−
4
a
c
=
81
−
80
=
1
-->
d
=
±
1
There are 2 real roots:
x
=
−
b
2
a
±
d
2
a
=
−
9
4
±
1
4
=
−
9
±
1
4
x
1
=
−
10
4
=
−
5
2
and
x
2
=
−
8
4
=
−
2
Answer link
George C.
Dec 22, 2016
x
=
−
2
or
x
=
−
5
2
Step-by-step explanation:
Answered by
0
Find the sum of the zeroes for the quadratic equation (-2)x^2 +(-9)x – 1=0.
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