Question

Допоможіть!!!!!!!!!!!!!!!!!​

Answer 1

$\displaystyle 3x^2+7xy-4x^2-8xy+4y^2=-x^2+7xy-8xy+4y^2=-x^2-xy+4y^2$

Answer 2

Ответ:

$3x {}^{2} + 7xy - 4x {}^{2} - 8xy + 4y {}^{2} = - x {}^{2} + 7xy - 8xy + 4y {}^{2} = - x {}^{2} - xy + 4y {}^{2}$