Boa noite!
[tex](3x+1)^{2} +4x*(-2)\\9x^{2}+6x+1-8x\\9x^{2}-2x+1\\[/tex]
[tex](2X*3Y)^{2} - (3X+2Y)^{2}\\ (6y)^{2} - (9x^{2} + 12xy + 4y^{2})\\36y^{2} - 9x^{2} - 12xy - 4y^{2}\\32y^{2}- 9x^{2} - 12xy\\[/tex]
[tex](a+3b)^{2} - 2(3y+2)^{2} + (Y+5)^{2} \\\\a^{2}+6ab+9b^{2}-2(9y^{2}+12y+4+y^{2}+10y+25\\a^{2}+6ab+9b^{2}-17y^{2}-14y+17[/tex]
Espero ter ajudado
Bons estudos!!
