Factorise a (3b+6)+(3b+6)
Answers
Answered by
0
Answer:
(3b+6)²=0
(3b)²+6²+2×3b×6=0
Step-by-step explanation:
9b²+36+36b=0
9(b2+4+4b)=0
b²+4+4b=0
Answered by
0
We want to simplify
a
3
b
6
−
b
3
. The first thing to do is to factor out
b
3
to give
b
3
(
a
3
b
3
−
1
)
.
If we look carefully, we can see that
b
3
(
a
3
b
3
−
1
)
=
b
3
(
(
a
b
)
3
−
1
3
)
. So now we can use a formula to simplify even more:
a
3
−
b
3
=
(
a
−
b
)
(
a
2
+
a
b
+
b
3
)
So
b
3
(
a
3
b
3
−
1
)
=
b
3
(
(
a
b
)
3
−
1
3
)
=
b
3
(( a b ) − 1 ) ( a b ) 2 + 2 ( a b ) + 1 2 ) = b 3 ( a b − 1 ) ( a 2 b 2 + a b + 1 )
Hope it helps you
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