Question

x^2+2xy+y^2-1 роскласти на множники СРОЧНО! Даю 45 балов

Answer 1

Объяснение:

x^2+2xy+y^2-1 = 1-(x+y)²=(x+y-1)(x+y+1)

Answer 2

$=\displaystyle\bf\\x^{2} +2xy+y^{2} -1=(\underbrace{x^{2} +2xy+y^{2})}_{ (x+y)^{2} }-1^{2} =(x+y)^{2} -1^{2} =\\\\\\=(x+y-1)\cdot(x+y+1)$