Ответы и объяснения

2013-02-27T00:36:05+04:00

1

 

а)=к2-2ку+у2

б)к2+14к+49

в)4к2-20к+25

г)16к2+24ку+9у2

д)к4-10к2у+25у2

 

2

 

(6m+7n)2=36m2+26mn+49n2

2013-02-27T00:39:20+04:00

1)  (R-Y)^2= R^2-2YR+Y^2

(R+7)^2=R^2+14R+49

(2R-5)^2=4(R^2)-20R+25

(4R+3Y)^2= 16(R^2)+24RY+3(Y^2)

(R^2-5Y)^2=R^4-10R^2Y+25(Y^2)

 

2) (6m+7n)^2=36(m^2)+84mn+49(n^2)