Not understanding what I underlined in the pic please help explain it’s number 16

in the equation that u underlined u just take common in it
like
-x+xy
-x(1-y)
hope it helps you
have a great day bud. ;)
The product of the polynomial is x² - x + xy + 16y - 2y² - 30
Polynomial is an expression that involves only the operations of addition, subtraction, multiplication of variables.
Polynomials are classified based on degree as linear, quadratic, cubic and so on.
Given the polynomial:
(x + 2y - 6)(x - y + 5) = x² + 2xy - 6x - xy - 2y² + 6y + 5x + 10y - 30
= x² - x + xy + 16y - 2y² - 30
The product of the polynomial is x² - x + xy + 16y - 2y² - 30
Find out more on Polynomial at: https://brainly.com/question/2833285