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Sagot :
Answer:
x = - 3
Step-by-step explanation:
To find the zero, let f(x) = 0, that is
4x + 12 = 0 ( subtract 12 from both sides )
4x = - 12 ( divide both sides by 4 )
x = - 3 ← is the zero
Solve the equation for
x
, when
f
(
x
)
=
0
Then,
x
=
3
.
Explanation:
I assume you mean to find the solution/root (radical)
x
, when
f
(
x
)
=
0
.
Then, this is simple.
Just set
f
(
x
)
to 0 and solve the equation for
x
:
f
(
x
)
=
4
x
−
12
=
0
First we can add 12 on both sides of the equality:
4
x
−
12
+
12
=
0
+
12
which becomes
4
x
=
12
We can now divide both sides of the equality by 4:
4
x
4
=
12
4
and we have
x
=
3
The "zero", or the solution for
f
(
x
)
=
0
is
x
=
3
.
Q.E.D.
x
, when
f
(
x
)
=
0
Then,
x
=
3
.
Explanation:
I assume you mean to find the solution/root (radical)
x
, when
f
(
x
)
=
0
.
Then, this is simple.
Just set
f
(
x
)
to 0 and solve the equation for
x
:
f
(
x
)
=
4
x
−
12
=
0
First we can add 12 on both sides of the equality:
4
x
−
12
+
12
=
0
+
12
which becomes
4
x
=
12
We can now divide both sides of the equality by 4:
4
x
4
=
12
4
and we have
x
=
3
The "zero", or the solution for
f
(
x
)
=
0
is
x
=
3
.
Q.E.D.
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