Find and correct the error of the following factor. factor by grouping: 3x² + xy2 – 3xy-y? line 1: = (3x² + xy2)+(-3xy – y? ) line 2: = x(3x + y2) - y(3x – y2) line 3: = (x-y) (3x +y? )

3x² + xy2 – 3xy-y? >> 3x² - xy - y

line 1: = (3x² + xy2)+(-3xy – y?)

ANS 3x² - xy - y 《Correct》

line 2: = x(3x + y2) - y(3x – y2)

ANS 3x² - xy +2y²

line 3: = (x-y) (3x +y?)

ANS 3x² - 2xy - y²

If it incorrect, I'm sorry.

x= 149. 24+7=31. 180-31=149

your welcome

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315