Question

1) x^2+2xy+y^2-m^2
2) b^2-c-8b+16

Answer 1

1)x²+2xy+y²-m²
(x+y)²-m²
(x+y-m)(x+y+m)
2)b²-c-8b+16
b²-8b+16-c
(b-4)²-c
(b-4-√c)(b-4+√c)