Объяснение:
1)9x²-12xy+4y²=(3x)²-12xy+(2y)²=(3x-2y)²
2)25t²+30t+9=(5t)²+30t+3²=(5t+3)²
3)16k²-40k+25=(4k)²-40k+5²=(4k-5)²
4)121a²-44ac+4c²=(11a)²-44ac+(2c)²=(11a-2c)²
5)4n²+52mn+169m²=(2n)²+52mn+(13m)²=(2n+13m)²
6)36t²-84ts+49s²=(6t)²-84ts+(7s)²=(6t-7s)²
Объяснение:
1)9x²-12xy+4y²=(3x)²-12xy+(2y)²=(3x-2y)²
2)25t²+30t+9=(5t)²+30t+3²=(5t+3)²
3)16k²-40k+25=(4k)²-40k+5²=(4k-5)²
4)121a²-44ac+4c²=(11a)²-44ac+(2c)²=(11a-2c)²
5)4n²+52mn+169m²=(2n)²+52mn+(13m)²=(2n+13m)²
6)36t²-84ts+49s²=(6t)²-84ts+(7s)²=(6t-7s)²