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Descompuneti in factori următoarele expresii, utilizând formula:
[tex] {a}^{2} - 2ab + {b}^{2} = (a -b) ^{2} [/tex]
a)
[tex] {x}^{2} - 4xy + 4 {y}^{2} [/tex]
b)
[tex] {x}^{2} - 6x + 9[/tex]
c)
[tex] {x}^{2} - 12x + 36[/tex]
d)
[tex]25 {a}^{2} - 20a + 4[/tex]
e)
[tex]49 {x }^{2} - 28xy + 4 {y}^{2} [/tex]
f)
[tex] {x}^{2} {y}^{2} - 4xy + 4[/tex]
g)
[tex] {a}^{2} - 18ac + 81 {c}^{2} [/tex]
h)
[tex]64 - 144x + 81 {x}^{2} [/tex]
DAU COROANA!!!!!



Răspuns :

a)(x-2)^2

b)(x-3)^2

c)(x-6)^2

d)(5a-2)^2

e)(7x-2)^2

f)(xy-2)^2

g)(a-9c)^2

h)(8-9x)^2