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Byju's Answer
Standard VIII
Mathematics
Factorisation by Common Factors
Factorise:a2+...
Question
Factorise:
a
2
+ 6a − 91
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Solution
T
h
e
g
i
v
e
n
e
x
p
r
e
s
s
i
o
n
i
s
a
2
+
6
a
-
91
.
Find
two
numbers
that
follow
the
conditions
given
below
:
S
u
m
=
6
P
r
o
d
u
c
t
=
-
91
C
l
e
a
r
l
y
,
t
h
e
n
u
m
b
e
r
s
a
r
e
13
a
n
d
-
7
.
a
2
+
6
a
-
91
=
a
2
+
13
a
-
7
a
-
91
=
a
(
a
+
13
)
-
7
(
a
+
13
)
=
(
a
+
13
)
(
a
-
7
)
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