Ответ:
Объяснение:
1) =9х²+12ху+12ху+16у²=3х(3х+4у)+4у(3х+4у)=(3х+4у)(3х+4у)=(3х+4у)²
2)=25х²-15ху-15ху+9у²=5х(5х-3у)-3у(5х-3у)=(5х-3у)(5х-3у)=(5х-3у)²
3)=36p²+42pk+42pk+49k²=6p(6p+7k)+7k(6p+7k)=(6p+7k)(6p+7k)=(6p+7k)²
4)=(5a-9b)²
5)=(0,7t+4n)²
6)=(5y-0,8х)²
7)=(1/4х+2у)²
8)=(3у-1/3х)²
9)=(5х+1/5у)²
10)=(1/4х-12у)²
11)=(4х+1/8у)²
12)=(2а²+1)²
13)=(7b³-4)²
14)=(3x-5y)²
15)=(6a+b²)²
16)=(3p-4c³)²
17)=(8-3n²)²