Question

Please :1))преобразуйте в многочлен:
1)(p-2)^2+3p^2=
2)81x^2-(9x+7y)^2=
3)c(2c-1)^2=
4)-4p(p-2a)^2=
5)a(a-7)+(a+3)^2=

Answer 1

$(p-2)^{2} +3p^{2} = p^{2} -4p+4+3p^{2}=4p^{2}-4p+4$
$81x^{2}-81x^{2}-126xy-49y^{2}=-126xy-49y^{2}$
$c(4c^{2}-4c+1)=4c^{3}-4c^{2}+c$
$-4p(p^{2}-4ap+4a^{2})=-4p^{3}+16ap^{2}-16a^{2}p$
$a^{2}-7a+a^{2}+6a+9=2a^{2}-a+9$