Question

Ayuda es para hoy es urgente

Answer 1

Explicación paso a paso:

1)

$(2x+3y+4)(2x+4y)\\=4x^2+8xy+6xy+12y^2+8x+16y\\=4x^2+14xy+12y^2+8x+16y\\=2(2x^2+7xy+6y^2+4x+8y)$

2)

$(5xy+2y-2x)(2+5x-3xy)\\=10xy+25x^2y-15x^2y^2+4y+10xy-6xy^2-4x-10x^2+6x^2y\\=20xy+31x^2y-15x^2y^2+4y-6xy^2-4x-10x^2$

3)

$(5xy^2+7xy-4x^2-6y^3)(3xy+4x-5y-3)\\=15x^2y^3+20x^2y^2-25xy^3-15xy^2+21x^2y^2+28x^2y-35xy^2-21xy-12x^3y-16x^3+20x^2y+12x^2-18xy^4-24xy^3+30y^4+18y^3\\=15x^2y^3+41x^2y^2-49xy^3-50xy^2+48x^2y-21xy-12x^3y-16x^3+12x^2-18xy^4+30y^4+18y^3$

Un cordial saludo