Question

pls answer fast , i will mark ibrainliest if correct, i need step by step explination!!

Answer 1

Step-by-step explanation:

A+B-C

$= ( {x}^{2} + {y}^{2} - 2x) + (2 {x}^{2} - 2 {y}^{2} + 3y) - (2 {x}^{2} + {y}^{2} - 4y)$

$= {x}^{2} + {y}^{2} - 2x + 2 {x}^{2} - 2 {y}^{2} + 3y - 2 {x}^{2} - {y}^{2} + 4y$

$= {x}^{2} - 2 {y}^{2} - 2x + 7y$

$= {x }^{2} - 2x - 2 {y}^{2} + 7y$

$= x(x - 2) - y(2y - 7)$