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Let’s check out your problem:
Simplify the expression:
x
2
+
25
x
2
−
10
x
+
25
\frac{x^{2}+25}{x^{2}-10x+25}
x
2
−
10
x
+
25
x
2
+
25
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Calculus
Find derivatives of using multiple formulae
Full solution
Q.
Simplify the expression:
x
2
+
25
x
2
−
10
x
+
25
\frac{x^{2}+25}{x^{2}-10x+25}
x
2
−
10
x
+
25
x
2
+
25
Identify function:
Identify the function to differentiate.
\newline
Function:
(
x
2
+
25
)
/
(
x
2
−
10
x
+
25
)
(x^{2}+25)/(x^{2}-10x+25)
(
x
2
+
25
)
/
(
x
2
−
10
x
+
25
)
Apply quotient rule:
Apply the quotient rule:
(
v
′
u
−
u
v
′
)
/
v
2
(v'u - uv') / v^2
(
v
′
u
−
u
v
′
)
/
v
2
. Let
u
=
x
2
+
25
u = x^2 + 25
u
=
x
2
+
25
and
v
=
x
2
−
10
x
+
25
v = x^2 - 10x + 25
v
=
x
2
−
10
x
+
25
. Then,
d
u
/
d
x
=
2
x
du/dx = 2x
d
u
/
d
x
=
2
x
and
d
v
/
d
x
=
2
x
−
10
dv/dx = 2x - 10
d
v
/
d
x
=
2
x
−
10
.
Substitute into formula:
Substitute into the quotient rule formula.
\newline
(
d
d
x
)
=
(
x
2
−
10
x
+
25
)
(
2
x
)
−
(
x
2
+
25
)
(
2
x
−
10
)
(
x
2
−
10
x
+
25
)
2
(\frac{d}{dx}) = \frac{(x^2 - 10x + 25)(2x) - (x^2 + 25)(2x - 10)}{(x^2 - 10x + 25)^2}
(
d
x
d
)
=
(
x
2
−
10
x
+
25
)
2
(
x
2
−
10
x
+
25
)
(
2
x
)
−
(
x
2
+
25
)
(
2
x
−
10
)
Expand and simplify:
Expand and simplify the numerator.
\newline
Numerator =
2
x
3
−
20
x
2
+
50
x
2x^3 - 20x^2 + 50x
2
x
3
−
20
x
2
+
50
x
-
2
x
3
−
10
x
2
−
50
x
+
250
2x^3 - 10x^2 - 50x + 250
2
x
3
−
10
x
2
−
50
x
+
250
\newline
= (-10\)x^
2
2
2
+
100
100
100
x +
250
250
250
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