Question

simplifique as expressões

a) (3x+1)²+4x.(-2)

b) (2X3Y)² - (3X+2Y) ²

c) (a+3b)²- 2(3y+2)²+ (Y+5)²​

Answer 1

Boa noite!

$(3x+1)^{2} +4x*(-2)\\9x^{2}+6x+1-8x\\9x^{2}-2x+1$

$(2X*3Y)^{2} - (3X+2Y)^{2}\\ (6y)^{2} - (9x^{2} + 12xy + 4y^{2})\\36y^{2} - 9x^{2} - 12xy - 4y^{2}\\32y^{2}- 9x^{2} - 12xy$

$(a+3b)^{2} - 2(3y+2)^{2} + (Y+5)^{2} ​\\\\a^{2}+6ab+9b^{2}-2(9y^{2}+12y+4+y^{2}+10y+25\\a^{2}+6ab+9b^{2}-17y^{2}-14y+17$

Espero ter ajudado

Bons estudos!!