Respostas

  • Ind
  • Ambicioso
2013-12-04T16:03:36-02:00
Faça assim :
x²-121 = 0
x² =121
x = √121
x = 11


1 5 1
se for (a-b)² = a² - 2ab +b²
essa da qui
(2f-3g)²
a)(x³-3y²)(x³-3y²)=
b)(2f-3g)²=
c)(x-3)(x+3)-x(x-3y)=
d)(5a+3)²+(5a-3)²-2(a+5)=
e)(2x-3)²+(x-5)(x+5)-(x+4)²=
pfv
vc sabe?