Question

Представьте в виде квадрата двучлена трехчлены.
ДАМ 20 БАЛЛОВ .
1) 9у^2-12ху+4у^2
2) 25t^2 + 30t+9
3) 16r^2-40r+25
4)121a^2-44ac+c^2
5)4n^2+52mn+169m^2
6)36t^2-84ts+49s^2

Answer 1

1.
${9y}^{2} - 12xy - {4y}^{2} = (3y - 2y) ^{2}$
3.${16r}^{2} - 40r + 25 = {(4r - 5)}^{2}$
5.
${4n}^{2} + 52mn + {169m}^{2} = {(2n +13) }^{2}$
2.
${25t}^{2} + 30t + 9 = {(5t + 3)}^{2}$
4.
${121a}^{2} - 44ac + {c}^{2} = {(11a - c)}^{2}$
6.
${36t}^{2} - 84ts + {49s}^{2} = {(6t - 7s)}^{2}$