Răspunsuri

  • Utilizator Brainly
2014-02-16T22:53:07+02:00
(2x-1)(2x+1)+(x+rad4)^2=(4x^2-1)+(x^2+4x+4)=4x^2-1+x^2+4x+4=5x^2+4x+3

Am folsit:
Rad4=2
(a+b)(a-b)=a^2-b^2
(a+b)^2=a^2+2ab+b^2



2014-02-16T22:55:16+02:00