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Efectuati utilizand formulele calcului prescurtat:
a) (2a-3)(2a+3)
b)(2-3a)(2+3a)
c)(m-2n)la puterea a 2
d)(4m+n)la puterea a 2


Răspuns :

a)2a^2-3^2
b)2^2-3a^2
c)m^2-4mn+2n^2
d)4m^2+8mn+n^2

^2=Ridicat la puterea a 2-a
a)2a^2-3^2
b)2^2-3a^2
c)m^2-4mn+2n^2
d)4m^2+8mn+n^2