a)25-y²=(5-y)(5+y)
б)х²+6х+9=(х+3)²
в)4х²-4х+1=(2х-1)²
г)4у²-12у+9=(2у-3)²
д)9m²+24m+16=(3m+4)²
e)(5c-1)²-(4c-1)²=(5c-1-4c+1)(5c-1+4c-1)=c(9c-2)
а)
б)
в)
г)
д)
е)
a)25-y²=(5-y)(5+y)
б)х²+6х+9=(х+3)²
в)4х²-4х+1=(2х-1)²
г)4у²-12у+9=(2у-3)²
д)9m²+24m+16=(3m+4)²
e)(5c-1)²-(4c-1)²=(5c-1-4c+1)(5c-1+4c-1)=c(9c-2)
а)![\displaystyle \tt 25-y^2=\bold{(5-y)(5+y)}](/tpl/images/1069/5236/97911.png)
б)![\displaystyle \tt x^2+6x+9=x^2+2\cdot x\cdot3+3^2=(x+3)^2=\bold{(x+3)(x+3)}](/tpl/images/1069/5236/ecb21.png)
в)![\displaystyle \tt 4x^2-4x+1=(2x)^2-2\cdot 2x \cdot 1+1^2=(2x-1)^2=\bold{(2x-1)(2x-1)}](/tpl/images/1069/5236/73e2d.png)
г)![\displaystyle \tt 4y^2-12y+9=(2y)^2-2\cdot 2y \cdot3+3^2=(2y-3)^2=\bold{(2y-3)(2y-3)}](/tpl/images/1069/5236/45e04.png)
д)![\displaystyle \tt 9m^2+24m+16=(3m)^2+2\cdot 3m \cdot 4+4^2=(3m+4)^2=\bold{(3m+4)(3m+4)}](/tpl/images/1069/5236/f79a6.png)
е)