Question

what is added to x2y-3x+4+0 to get the sum -5x2y+7x-0

Answer 1

let A be added,

then

x²y-3x+4 + A = - 5x²y+7x,

then


A= -5x²y+7x-x²y+3x-4,

A=-6x²y+10x-4

Answer 2

*(x2y-3x+4+0)+(-5x2y+7x-0)

*x2y-3x+4+0-5x2y+7x-0

*x2y-5x2y-3x-0+4+0+7x

*-4x2y-3x+11x

*-4x2y+8x