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(4√5x-√15y)(4√5x+√15y) =...
DAU 8 CORONITEEE PROMITTT!!!


Răspuns :

(4√5x-√15y)(4√5x+√15y) =(folosim (a-b)(a+b)=ala a 2-b la a 2
16*5
[tex] x^{2} [/tex] -15[tex] y^{2} [/tex]
80[tex] x^{2} [/tex]-15[tex] x^{2} [/tex]