Question

Ex 6 de mai jos doar (L) (M) (N)

Answer 1

[tex]l) 9- b^{2} c^{2}= 3^{2} -(bc)^2=(3-bc)(3+bc) \\ m) 4 a^{2}b^{2}-1=(2ab)^2- 1^{2}=(2ab-1)(2ab+1) \\ n) p^{2}- a^{2}b^{2}=p^{2}-(ab)^2=(p-ab)(p+ab)[/tex]
Am aplicat formula de calcul prescurtat: diferenta patratelor
$a^{2} -b^{2}=(a-b)(a+b)$