Leesa549 Leesa549

16-07-2015
Mathematics

contestada

Determine if a2 + 4a + 4 is a perfect square trinomial and factor.
a. (a 4)2
b. (a +2)2
c. (a 2)2
d. Not a perfect square trinomial.

Respuesta :

Benjamin16 Benjamin16

18-07-2015

[tex]1^{o} \\ \\ (a+b)^{2}=a^{2}+2ab+b^{2} \\ \\ a^{2}+4a+4=(a+2)^{2} \\ \\ 2^{o} \\ \\ a^{2}+4a+4=a^{2}+2a+2a+4=a(a+2)+2(a+2)= \\ \\ =(a+2)(a+2)=(a+2)^{2}[/tex]

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