Question

please answer my question​

Answer 1

Answer:

1.x^2+2x-y^2+2y

2.2480

hope it will helps you

Answer 2

Step-by-step explanation:

1} [(x+1)+(y-1)][(x+1)-(y-1)]

=[x+y][x-y-2]

2}(312+308)(312-308)

=620(4)

=2480