120k views
0 votes
What should be added to x2 +xy+y2 to obtain 3x2 - 4xy - y2​

User Sirmdawg
by
7.6k points

1 Answer

4 votes

Answer:

2x² - 5xy - 2y²

Explanation:

Subtract x² + xy + y² from 3x² - 4xy - y² to obtain the expression to be added

3x² - 4xy - y² - (x² + xy + y² ) ← distribute by - 1

=3x² - 4xy - y² - x² - xy - y² ← collect like terms

= 2x² - 5xy - 2y²

Thus

adding 2x² - 5xy - 2y² to x² + xy + y² gives 3x² - 4xy - y²

User Quickredfox
by
7.8k points

Related questions

asked Sep 5, 2017 69.3k views
Eamorr asked Sep 5, 2017
by Eamorr
8.6k points
1 answer
0 votes
69.3k views
asked Dec 24, 2018 104k views
Ben Cottrell asked Dec 24, 2018
by Ben Cottrell
8.6k points
1 answer
2 votes
104k views
asked Nov 6, 2021 201k views
Roham asked Nov 6, 2021
by Roham
9.0k points
2 answers
0 votes
201k views