1) 100-140a+49a^2 = (10 - 7а)^2
2) x^4+18x^2y+81y^2= (x^2+9y)^2
100-140a+49a^2 =
(10-7a)^2
x^4+18x^2y+81y^2=
(x^2+9y)^2
1) 100-140a+49a^2 = (10 - 7а)^2
2) x^4+18x^2y+81y^2= (x^2+9y)^2
100-140a+49a^2 =
(10-7a)^2
x^4+18x^2y+81y^2=
(x^2+9y)^2