Răspunsuri

2014-04-27T15:25:42+03:00
Amplifici cu 4a+5b...(4a-5b)(2a-3b) supra (4a-5b)(4a+5b)...8a la patrat decat a minus 15b patrat decat b minus 13ab supra 16a patrat decat a minus 25b patrat decat b...