Răspuns:
Explicație pas cu pas:
37
=(a+x)²-(b+y)²=(a+b+x+y)(a-b+x-y)
38
(a-b)²+(a-b)=(a-b)(a-b+1)
39
xy-bx-ax+ab-(xy-ax-by+ab)=0
40
x²(x²-16)=x²(x+4)(x-4)
41
(x-3y)(x+3y)-2(x-3y)=(x-3y)(x+3y-2)
42
x(x²+5x+6)=x(x+2)(x+3)
43
a(x-y)-b(x-y)-(x-y)=(x-y)(a-b-1)
44
(x-√2)(x+√2)-(x-√2)=(x-√2)(x+√2-1)
