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Mathematics
Mathematics
Problem
Solve
2
x
2
−
7
x
−
4
=
0
2x^{2}-7x-4=0
2
x
2
−
7
x
−
4
=
0
. a)
x
=
−
4
or
x
=
1
2
x=-4\text{ or }x=\dfrac{1}{2}
x
=
−
4
or
x
=
2
1
b)
x
=
8
or
x
=
−
1
x=8\text{ or }x=-1
x
=
8
or
x
=
−
1
c)
x
=
−
1
2
or
x
=
4
x=-\dfrac{1}{2}\text{ or }x=4
x
=
−
2
1
or
x
=
4
d)
x
=
7
+
17
4
or
x
=
7
−
17
4
x=\dfrac{7+\sqrt{17}}{4}\text{ or }x=\dfrac{7-\sqrt{17}}{4}
x
=
4
7
+
17
or
x
=
4
7
−
17
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