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Mathematics
Problem
Which of the following is the complete factorisation of
x
2
−
3
x
−
28
x^{2}-3x-28
x
2
−
3
x
−
28
? a)
(
x
+
7
)
(
x
−
4
)
(x+7)(x-4)
(
x
+
7
)
(
x
−
4
)
b) Cannot be factorised over the integers c)
(
x
−
7
)
(
x
+
4
)
(x-7)(x+4)
(
x
−
7
)
(
x
+
4
)
d)
(
x
−
14
)
(
x
+
2
)
(x-14)(x+2)
(
x
−
14
)
(
x
+
2
)
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