Question

Answer the following questions:
1. What must be subtracted from 8x3 + 7x2y - 3xy? – y to get
7xy2 - y3 – 3x2y + 5x3 ?​

Answer 1

Answer:

let the required no. be a.

now,

(8x³+7x²y-3xy)-a=7xy²-y³-3x²y+5x³

or,a=(8x³+7x²y-3xy)-7xy²-y³-3x²y+5x³

or,a=8x³+5x³-y³+7x²y-3x²y-7xy²-3xy

=13x³-y³+4x²y-7xy²-3xy

Answer 2

Answer:

Answer:8x3 + 7x2y - 3xy – y - a number =

7xy2 - y3 – 3x2y + 5x3

8x3 + 7x2y - 3xy – y - ( 7xy2 - y3 – 3x2y + 5x3) = a number

8x3 - 5x3 + y3 + 7x2y + 3x2y - 7xy2 - 3xy - y = a number

3x3 +y3 + 10x2y - 7xy2 - 3xy - y = answer