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Foundations
hard
0:00.0
Solve for
x
x
x
:
x
2
−
16
=
0
x^2 - 16 = 0
x
2
−
16
=
0
.
A
x
=
±
4
x = \pm 4
x
=
±
4
B
x
=
4
x = 4
x
=
4
C
x
=
−
4
x = -4
x
=
−
4
D
x
=
0
x = 0
x
=
0
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