Răspuns:
Explicație pas cu pas:
Buna!
[tex]\bf \circledast~~ 4x^{2} +7x= \boxed{\bf x\cdot(4x+7)}[/tex]
[tex]\bf \circledast~~ y^{2} +12y+36= y^{2} +2\cdot6\cdot y+36=\boxed{\bf (y+6)^{2}}[/tex]
[tex]\bf \circledast~~ 16a^{2} -25b^{2}=(4a)^{2} -(5b)^{2}=\boxed{\bf (4a+5b) \cdot (4a-5b)}[/tex]
#copaceibrainly
