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Descompuneti in factori:
a) x^{2}-y^{2}=
b) x^{2}-9=
c) 4-a^{2}=
d) 9y^{2}-16z^{2}=
e) 25x^{2}-9y^{2}=
f) a^{2}b^{2}-49=
Sper ca ma puteti ajuta!!


Răspuns :

[tex]a)x^2-y^2=(x-y)(x+y)\\ b)x^2-9=(x-3)(x+3)\\ c)4-a^2=(2-a)(2+a)\\ d)9y^2-16z^2=(3y-4z)(3y+4z)\\ e)25x^2-9y^2=(5x-3y)(5x+3y)\\ f)a^b\cdot b^2-49=(ab-7)(ab+7)[/tex]
Raoull
a)  [tex] x^{2}- y^{2} =(x-y)(x+y) [/tex]

b)  [tex] x^{2} -9=(x-3)(x+3)[/tex]

c)  [tex]4-a^2=(2-a)(2+a)[/tex]

d)  [tex]9y^2-16z^2=(3y-4)(3y+4)[/tex]

e)  [tex]25 x^{2}-9y^2=(5x-3y)(5x+3y)[/tex]

f)  [tex]a^2b^2-49=(ab-7)(ab+7)[/tex]

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