Factorise by splitting the middle term : 2x2 - 7x - 15. 30
Answers
Answered by
3
Step-by-step explanation:
Correct option is
A
(x-5)(2x+3)
2x
2
−7x−15
=2x
2
−10x+3x−15
=2x(x−5)+3(x−5)
=(x−5)(2x+3)
Answered by
0
Answer:
The real roots in
y
=
2
x
2
−
7
x
−
15
are
x
=
−
3
2
and
x
=
5
.
Explanation:
y
=
2
x
2
−
7
x
−
15
y
=
0
2
x
2
−
7
x
−
15
=
0
Attempting to factorise
2
x
2
+
3
x
−
10
x
−
15
=
0
x
(
2
x
+
3
)
−
5
(
2
x
+
3
)
=
0
(
x
−
5
)
(
2
x
+
3
)
=
0
x
−
5
=
0
x
=
5
2
x
+
3
=
0
2
x
=
−
3
x
=
−
3
2
The real roots in
y
=
2
x
2
−
7
x
−
15
are
x
=
−
3
2
and
x
=
5
.
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