Factorise:8-27x^3+54x^2-36x
Answers
Answered by
5
Step-by-step explanation:
Notice that the ratio between the first and second coefficients is not the same as that between the third and fourth.
That is:
27
54
≠
36
8
So this does not factor by grouping.
Note that the first and last terms are both perfect cubes:
27
x
3
=
(
3
x
)
3
8
=
2
3
So we might try
(
3
x
+
2
)
3
:
(
3
x
+
2
)
3
=
27
x
3
+
54
x
2
+
36
x
+
8
priyanshi025:
Actually I m not able to understand the answer given by you can u answer it by hit and trial method please
Answered by
2
Step-by-step explanation:
8-27x^3-36x+54x^2
2^3+(-3x)^3+3(2)^2(-3x)+3(2)-(3x)^2
(2-3x)^3
(2-3x)(2-3x)(2-3x) see if right I am sure it is
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