Question

Find the sum of 6x²-2y²-5xy, -5x²+3y²+8xy and x²+y²+4xy

Answer 1

Answer:

answer is 3x² - 10xy - 10y² - 9  

Step-by-step explanation:

sum of 4x² + 7xy + 3y² + 1 and 2x² - 5xy - 2y² + 8

4x² + 7xy + 3y² + 1 + 2x² - 5xy - 2y² + 8

6x² + 2xy + y² + 9

subtract of 6x² + 2xy + y² + 9 from 9x² - 8xy + 11y²

9x² - 8xy + 11y² - (6x² + 2xy + y² + 9)

9x² - 8xy + 11y² - 6x² - 2xy - y² - 9

3x² - 10xy - 10y² - 9