Question

12. Realiza las siguientes operaciones por suma o resta vertical a) (8x2 – 2x + 1) + (3x2 + 5x – 8) = - b) (2x3 - 3x2 + 5x - 1) - (x2 + 1 - 3x) = c) (4x3+ 3x2y- 6xy?)(2x-3y) d) (73+ 3y - 2y-1) = (y2 +2y)​

Answer 1

Respuesta:

A)(8x2 – 2x + 1) + (3x2 + 5x – 8)

=8x^2-2x+1+3x^2+5x-8

=8x^2+3x^2-2x+5x+1-8

=8x^2+3x^2-2x+5x-7

=11x^2-2x+5x-7

=11x^2+3x-7

B)(2x^3 - 3x^2 + 5x - 1) - (x^2 + 1 - 3x)

=2x^3-3x^2+5x-1-x^2-1+3x

=2x^3-3x^2-x^2+5x+3x-1-1

=2x^3-3x^2-x^2+5x+3x-2

=2x^3-4x^2+5x+3x-2

=2x^3-4x^2+8x-2

c) (4x^3+ 3x2y- 6xy)(2x-3y)

=(4x^3+6xy-6xy)(2x3y)

=4x^3(2x-3y)

d) (73+ 3y - 2y-1) = (y2 +2y)

y+342=y^2+2y

y^2+2y=y+342

y^2+2y-342=y+342-342

y^2+2y-342=y

y=18  ,  y=-19

ESPERO QUE TE AYUDE :)