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National
Medium
Algebra
7–9
Factorise
x
2
−
25
x^2 - 25
x
2
−
25
.
Fatoriza
x
2
−
25
x^2 - 25
x
2
−
25
.
Answer options
A.
x
(
x
−
25
)
x(x-25)
x
(
x
−
25
)
B.
(
x
+
5
)
2
(x+5)^2
(
x
+
5
)
2
C.
(
x
−
5
)
2
(x-5)^2
(
x
−
5
)
2
D.
(
x
−
5
)
(
x
+
5
)
(x-5)(x+5)
(
x
−
5
)
(
x
+
5
)
Check Answer
Solution
Step 1 of 3
1.
This is a difference of two squares:
a
2
−
b
2
=
(
a
−
b
)
(
a
+
b
)
a^2 - b^2 = (a-b)(a+b)
a
2
−
b
2
=
(
a
−
b
)
(
a
+
b
)
Next step
Show full solution