Question

answer this two questions ​

Answer 1

Step-by-step explanation:

$ab - bc + bc - ca \\ ab - ca$

$3 {x}^{2} - 2x + 5xy - 7 - 8 + 9xy - 3 {x}^{2} + 5x \\ 3x + 14xy - 15$

Answer 2

Answer:

hope this answer is helpful for you