find the
value roots of quadratic
equation
of
the
x²- x-6 are
Answers
Answered by
1
Answer:
Step-by-step explanation:
Write as
x
2
−
x
−
6
=
0
Notice that
3
×
2
=
6
And that
3
−
2
=
1
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We need the product (multiplication answer) to be negative (-6)
So either 3 is negative and 2 positive or the other way round as
(
−
a
)
×
(
+
b
)
=
−
a
b
But the
−
x
as the coefficient of -1
So if
(
−
a
)
+
(
+
b
)
=
−
1
then
−
a
must have the biggest value
So we have to have
(
−
3
)
+
(
+
2
)
=
−
1
and
(
−
3
)
×
(
+
2
)
=
−
6
all as required.
⇒
x
2
−
x
−
6
=
(
x
−
3
)
(
x
+
2
)
Answered by
2
Step-by-step explanation:
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