Пожалуйста помогите решить! ♥ 25Б

1) = [tex] x^{2} -4" alt="4 x^{2}-3x-7-2 x^{2} +3 x-1=2 x^{2} -8 = 2([tex] x^{2} -4" align="absmiddle" class="latex-formula">)
2) = $6 x^{2} -14x-6 x^{2} -3x=-17x$
3) = $a^{2} -4ab+4 b^{2} +a^{2} +4ab+4b^{2} =2a^{2} +8 b^{2} =2(a^{2}+4 b^{2} )$
4) = $49x^{2} +28xm-28xm-16m^{2} -49 x^{2} +56xm-16 m^{2} = 56xm-36m^{2}$ = $4m(14x-9m)$
5) = $x^{3}+ x^{2}+x- x^{2}-x-1+x^{3}-x- x^{2} +1=2x^{3}-x^{2} -x= [tex]x(2 x^{2}-x-1)$
6) = $x^{3}- 2x^{2} +4x+2 x^{2}- 4x+8- x^{3}-2x+ x^{2} +2$ = $x^{2} -2x+10$