Cрочно!! (p-2x)²+3p²= (6x-1)²= 81x²-(9x+7y)²=

Question

Cрочно!!
(p-2x)²+3p²=
(6x-1)²=
81x²-(9x+7y)²=

Answer 1

1е уравнение:
(p-2x)²+3p²= pp-4xx+9pp= 10p²-4x²
2е:
(6x-1)²= 36x²-1
т.к. 1²=1*1=1
3е:
81x²-(9x+7y)²= 6561xx-81xx+14yy=6480x²+14y²