Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Mathematics
Mathematics
Problem
Find the complete factorisation of
49
−
x
2
49-x^{2}
49
−
x
2
. a)
(
x
−
7
)
(
x
+
7
)
(x-7)(x+7)
(
x
−
7
)
(
x
+
7
)
b)
7
(
7
−
x
)
7(7-x)
7
(
7
−
x
)
c)
(
7
−
x
)
(
7
+
x
)
(7-x)(7+x)
(
7
−
x
)
(
7
+
x
)
d)
(
7
+
x
)
2
(7+x)^2
(
7
+
x
)
2
Browse the problem library